CTV Is Eating Linear TV’s Lunch What the $72 Billion Shift Means for Advertisers

Executive Summary

Television advertising is undergoing its most consequential structural transformation since the invention of the remote control. The shift is not cyclical, not temporary, and not isolated to one market – it is a fundamental realignment of how audiences consume video content and how advertisers must reach them.

Connected TV (CTV) – the delivery of streaming video through internet-connected televisions and devices – has crossed the threshold from emerging channel to dominant platform. In May 2025, Nielsen confirmed what the industry had long anticipated: streaming viewership eclipsed the combined reach of broadcast and cable television for the first time in recorded measurement history. That moment was not a milestone. It was a verdict.

This report examines the scale and pace of the ad dollar reallocation, the structural reasons why audiences have permanently migrated to streaming, the programmatic capabilities that make CTV a superior advertising product, and the specific strategic implications for advertisers operating across the four most developed English-language CTV markets: the United States, the United Kingdom, Canada, and Australia.

1. The $72 Billion Shift – Understanding the Scale and Speed

The headline figure of $72 billion represents the cumulative net reallocation of advertising investment from linear television formats into connected TV and digital video. But it is the velocity of this movement, not merely its scale, that defines its strategic urgency.

1.1 Linear TV: A Structural Decline, Not a Cyclical Dip

US linear TV advertising spend is projected to reach $64.94 billion in 2026 – still a substantial figure in absolute terms, but one that masks an accelerating downward trajectory. Traditional pay TV households are forecast to contract from 43.2 million in 2026 to just 33 million by 2030, a reduction of nearly a quarter within four years. This is not a ratings fluctuation driven by a weak content slate. It is cord-cutting made permanent by habit.

Globally, the picture is even more stark. Linear TV advertising now accounts for just 12.4% of total global media spend – down from 41.3% in 2013. That represents a collapse of nearly 70 percentage points of market share over thirteen years. In 2026 alone, global linear TV ad spend is expected to decline by more than 11% year-on-year.

Critically, however, total television advertising spend in the United States is not collapsing – it is growing. The combined linear and CTV ad market is expected to surpass $100 billion in 2026. The money is not exiting television; it is migrating from one delivery infrastructure to another, faster than most advertiser planning cycles can accommodate.

1.2 CTV: A Market Growing at Twice the Industry Rate

US CTV ad spend is projected to reach approximately $38 billion in 2026, growing at roughly 14% – approximately twice the growth rate of the broader US advertising market. By 2029, that figure is expected to climb to $51 billion, reflecting continued expansion of ad-supported streaming tiers across all major platforms.

The IAB’s 2026 Outlook report projects 13.8% growth in US CTV ad spend for the year, with CTV and social media jointly leading all media channels in projected spend increases. Among advertisers surveyed, 56% stated they planned to increase their CTV budgets in 2026.

2. Why Audiences Left Linear TV – And Why They Are Not Coming Back

To understand the trajectory of advertising dollars, it is essential first to understand the audience migration that preceded and continues to drive it. The movement from linear to streaming is not a generational preference – it is a rational response to a fundamentally superior product.

2.1 The Control Imperative

Linear television is built around a broadcaster’s schedule. Viewers must be present at a specified time to watch a specified programme, and they must accept an ad load that typically exceeds 15 minutes per hour. Streaming inverts this model entirely: the viewer controls what they watch, when they watch it, and can do so at a fraction of the ad exposure.

CTV platforms typically carry between one and nine minutes of advertising per hour – a reduction of up to 90% compared to linear television. This dramatically reduced ad load has two significant implications for advertisers: the ads that do run receive substantially more viewer attention, and viewer resistance to those ads is considerably lower. The viewer who has chosen to watch an ad-supported tier of a streaming service is, in measurable terms, a more receptive audience than the viewer tolerating a commercial break they cannot skip.

2.2 The Nielsen Inflexion Point

In May 2025, Nielsen’s monthly Gauge report recorded a historic inflexion: streaming viewership – measured as a percentage of total television consumption – exceeded the combined audience of broadcast and cable television for the first time. This was not an anomaly produced by a single blockbuster streaming release. It was the confirmation of a trend that had been building progressively since the mass adoption of smart TVs and the proliferation of streaming services from 2019 onwards.

2.3 Demographic Composition: Who Is on CTV?

Linear TV retains meaningful strength among viewers aged 55 and older, a demographic that continues to watch traditional broadcast and cable at rates that exceed streaming consumption. For advertisers whose target audience skews to this group – certain pharmaceutical categories, retirement financial services, and some insurance products – linear TV retains a legitimate allocation rationale.

However, for the vast majority of consumer-facing advertisers, the demographics most critical to revenue – millennials, Gen X, Gen Z, and adults aged 25–54 – have overwhelmingly migrated to streaming platforms. These are the demographics with the highest disposable income, the highest lifetime customer value, and the highest responsiveness to digital advertising formats. An estimated 70% of US households are expected to use CTV in some form in 2026, cementing it as a mainstream, mass-reach channel rather than a niche or supplementary one.

3. The Programmatic Revolution – Why CTV Is a Superior Advertising Product

The audience migration to streaming would be significant on its own, but it is the parallel revolution in programmatic technology that elevates CTV from a simple audience substitution to a genuinely superior advertising medium. More than 90% of CTV display ad spend now occurs programmatically, according to eMarketer research – a figure that represents both the maturity of the infrastructure and the irreversibility of the shift.

When you advertise on linear television, you are purchasing time in a broadcast schedule – a slot delivered to whoever happens to be watching at that moment. When you advertise on CTV programmatically, you are purchasing access to defined audiences – specific households and individuals identified through behavioural, demographic, intent, and first-party data signals. The practical implications of this distinction span every stage of the advertising lifecycle.

3.1 Precision Targeting at the Household Level

CTV’s most transformative capability relative to linear TV is addressable audience targeting. Rather than buying a demographic proxy – adults aged 25–54 in a specific market – CTV advertisers can target based on a rich matrix of data signals that include income band and wealth indices, home ownership status and recent purchase activity, category purchase intent derived from browsing and transaction data, geographic location at postcode or even neighbourhood level, device and platform behaviour, and first-party CRM data matched against platform audiences.

A premium kitchen appliance brand, for example, can target households that exhibit high income indices, have recently purchased a home or completed a renovation, have demonstrated interest in cooking content, and are located within the delivery range of their premium retail partners – across every streaming platform those households use. This level of audience precision was structurally impossible on linear television, regardless of budget.

3.2 Real-Time Optimisation and Campaign Flexibility

Linear TV campaign planning is an exercise in long-range forecasting. Media plans are locked weeks or months in advance, creatives are submitted with significant lead times, and mid-campaign optimisation is either impossible or prohibitively expensive. If a creative is underperforming, the advertiser must wait until the next planning cycle to address it.

Programmatic CTV operates on an entirely different cadence. Campaigns can be monitored in real time, with budget reallocation, creative rotation, frequency cap adjustments, and audience refinements all executable mid-flight. An advertiser running a product launch can respond to early performance signals within 24 to 48 hours – suppressing underperforming audiences, amplifying high-converting segments, or swapping creative variants based on completion rate data. In a competitive and fast-moving marketing environment, this flexibility is not a feature enhancement; it is a structural competitive advantage.

3.3 Measurement That Means Something

Perhaps the most consequential advantage of CTV over linear television is the quality of measurement. Linear TV has relied for decades on Gross Rating Points (GRPs) – an aggregate estimate of reach and frequency derived from panel-based surveys and statistical modelling. GRPs tell an advertiser roughly how many people might have seen their ad. They cannot confirm whether the ad was seen, by whom, or what happened as a result.

CTV advertising generates impression-level data for every ad served – the device, the household, the timestamp, the creative version, the completion rate. More importantly, sophisticated CTV platforms and DSPs now enable outcome-based attribution: connecting individual ad exposures to downstream consumer actions, including website visits, product page views, purchase conversions, in-store foot traffic (via mobile location matching), and app downloads.

4. The CTV Ecosystem – Platforms, Formats, and Inventory Types

Understanding the CTV advertising landscape requires familiarity with the distinct inventory types, platform models, and buying mechanisms that define the ecosystem. Unlike linear TV – where three or four major broadcasters account for the majority of premium inventory – CTV advertising spans a complex and fragmented ecosystem of streaming services, smart TV operating systems, and connected devices.

4.1 Inventory Types: SVOD, AVOD, and FAST

• Subscription Video on Demand (SVOD) – ad-free tiers: Netflix, Disney+, Apple TV+, and Amazon Prime Video at their base tier offer no advertising inventory. However, all four major SVOD platforms now operate ad-supported tiers, generating premium inventory in high-quality, brand-safe environments.
• Ad-Supported Video on Demand (AVOD): Platforms such as Peacock, Paramount+, Discovery+, and ad-supported Netflix and Disney+ tiers represent the most rapidly growing segment of CTV inventory. AVOD reaches audiences who prefer streaming but are price-sensitive about subscriptions – a broad and commercially valuable demographic.
• Free Ad-Supported Streaming TV (FAST): Tubi, Pluto TV, The Roku Channel, and similar services deliver free, linear-style channel experiences with advertising. FAST channels have experienced explosive growth among cord-cutters seeking broadcast-style viewing without subscription fees, creating scale inventory opportunities for advertisers.
• Broadcaster Video on Demand (BVOD): In the UK and Australia especially, traditional broadcasters – BBC iPlayer, ITV Hub, Channel 4, Channel Nine, Channel Seven – operate their own streaming platforms. BVOD combines premium broadcast content with addressable digital advertising, making it a particularly attractive environment for brand advertisers.

4.2 Buying Mechanisms

CTV inventory can be accessed through several buying routes, each with distinct implications for cost, control, and transparency:

1. Programmatic Open Auction (Open RTB): Automated, real-time bidding across broad inventory pools. Largest scale, lowest CPMs, but requires active brand safety controls and content verification.
2. Private Marketplace (PMP): Curated inventory from specific publishers made available to selected buyers via private auction. Balances scale with premium placement and brand safety.
3. Programmatic Guaranteed (PG): Automated execution of guaranteed inventory commitments. Combines the precision of programmatic targeting with the certainty of direct deals.
4. Direct/Upfront: Traditional direct buys with major streaming platforms, negotiated upfront. Higher CPMs but premium placement, exclusivity, and first-party audience access from the platform.

5. Market-by-Market Analysis – US, UK, Canada, and Australia

The CTV revolution is a global phenomenon, but market-specific conditions determine the optimal strategy, platform mix, and measurement approach in each territory. Understanding these nuances is critical for advertisers operating internationally.

5.1 United States: The World’s Most Advanced CTV Market

The US represents the largest, deepest, and most technologically sophisticated CTV advertising market globally. With CTV spend approaching $38 billion in 2026 and a programmatic infrastructure that is more developed than in any other market, the US is the benchmark against which all other CTV markets are measured.

The defining feature of the US market in 2025-2026 is the rise of retail media networks as CTV buyers. Amazon DSP – leveraging Amazon’s vast first-party purchase data – and Walmart Connect are the fastest-growing buyer segments in US CTV, using connected TV as a medium to bridge commerce intent data with premium video advertising. This retail media + CTV combination enables attribution capabilities that were not possible in any prior TV advertising era.

5.2 United Kingdom: Transparency and Brand Safety Leadership

The UK CTV market benefits from a more regulated and transparent programmatic ecosystem than some other markets, partly a consequence of GDPR compliance requirements and the established standards set by the UK’s major broadcasters. UK CTV adoption is growing rapidly, with streaming platforms consolidating their position as primary viewing destinations across all adult demographics.

For UK advertisers, the availability of premium BVOD inventory through Channel 4, ITV, and Sky – all of which operate sophisticated addressable advertising platforms – provides a bridge between trusted broadcast brand environments and digital precision targeting. UK advertisers have access to some of the most reliable brand safety controls and content verification infrastructure in the global CTV ecosystem.

5.3 Canada: Efficient Scale with Bilingual Opportunity

Canadian CTV advertising is growing in line with North American trends, with particularly strong adoption of AVOD platforms. The Canadian market offers advertisers a distinctive opportunity: lower CPMs than the equivalent US inventory, combined with the ability to precision-target both English and French-speaking audiences – a segmentation that has historically been challenging and expensive in linear television.

5.4 Australia: Premium BVOD and High Per-Capita Penetration

Australia has one of the highest per-capita streaming penetration rates in the world, with a CTV ecosystem that has matured rapidly over the past three years. The major Australian commercial broadcasters – Nine, Seven, and Ten – have all invested significantly in their BVOD platforms (9Now, 7Plus, and 10Play, respectively), creating premium, brand-safe inventory environments that combine high-quality local and international content with addressable advertising capabilities.

For brand advertisers, the combination of premium BVOD inventory and Australia’s relatively concentrated media market makes it possible to achieve significant national reach through CTV while retaining the targeting precision and measurement accountability that programmatic enables.

6. The Programmatic CTV Playbook – Strategic Imperatives for 2026

Allocating budget to CTV is necessary but not sufficient. The advertisers generating superior returns from CTV are not simply shifting spend – they are rearchitecting their approach to targeting, creative, measurement, and media planning. The following strategic imperatives represent the difference between CTV that performs and CTV that merely runs.

6.1 Build on First-Party Data Foundations

CTV’s targeting advantages are only as powerful as the data underlying them. With third-party cookie deprecation accelerating and privacy regulation intensifying across all four markets, the advertisers best positioned to extract value from programmatic CTV are those who have invested in first-party data collection, activation infrastructure, and identity resolution.

First-party data – email lists, CRM databases, loyalty programme members, website visitor logs – can be matched against streaming platform audiences through clean rooms and privacy-safe identity resolution frameworks to enable precision targeting without reliance on third-party data. Advertisers who have built strong first-party assets are operating at a structural advantage relative to those dependent on third-party audience segments.

6.2 Adopt Unified Total Video Planning

The most sophisticated advertisers in 2026 are no longer treating linear TV and CTV as separate planning silos with separate budgets, separate creative workflows, and separate measurement frameworks. They are planning total video reach across linear, CTV, social video, and online video as a unified medium, using audience-based reach and frequency targets rather than GRP delivery goals.

Linear TV still plays a legitimate role in this unified framework – particularly for live events, news programming, and reaching audiences aged 55+. But it should be planned as one component of an integrated video strategy, with CTV handling the precision targeting, digital measurement, and younger demographic reach that linear cannot deliver.

6.3 Rethink Creative for the Streaming Environment

One of the most persistent and costly mistakes advertisers make when entering CTV is treating it as a digital delivery mechanism for existing 30-second linear TV spots. While 15- and 30-second formats remain dominant in CTV, the platform affords creative formats and viewer interaction possibilities that have no equivalent in linear television.

Effective CTV creative strategy includes testing interactive overlay formats that allow viewers to engage with the ad, request information, or save offers; employing shorter formats (6-second and 15-second) for frequency-capped retargeting; building creative variants that allow personalisation based on audience segment, time of day, or geographic context; and treating frequency management as a core creative strategy – oversaturation on CTV is more damaging than on linear, because the viewer’s control over their environment makes intrusion more noticeable and irritating.

6.4 Demand Transparency and Address Fraud

Programmatic CTV has a documented fraud and inventory quality problem that the industry is actively working to resolve. Connected device spoofing, domain misrepresentation, and the delivery of ads into non-viewable or low-quality inventory environments represent real and quantifiable risks that unsophisticated buyers routinely underestimate.

Advertisers should require programme-level content targeting and verification – not just app-level declarations – to ensure ads are running in environments consistent with brand values. Content verification layers from providers such as DoubleVerify and Integral Ad Science are now standard practice among sophisticated CTV buyers. Transparent reporting on where ads actually ran, which devices received them, and how completion rates varied by publisher environment should be a non-negotiable requirement of any CTV partnership.

6.5 Measure Business Outcomes, Not Just Delivery

The most transformative capability CTV offers – and the one most consistently underutilised – is outcome-based measurement. Advertisers who benchmark their CTV performance solely on reach, frequency, and completion rates are measuring the delivery of advertising, not its impact. The gap between delivery metrics and business outcome measurement is where CTV’s true competitive advantage over linear television is most clearly visible.

In 2026, sophisticated CTV measurement includes: foot traffic attribution linking ad exposure to physical store visits; online conversion attribution connecting impressions to website visits, lead form completions, and e-commerce transactions; brand lift measurement quantifying the incremental effect of CTV exposure on awareness, consideration, and purchase intent; and search lift measurement tracking the incremental increase in branded search queries following campaign exposure.

7. Looking Ahead – The 2027–2030 CTV Horizon

The structural trends shaping CTV today will intensify through the remainder of the decade. Several developments deserve particular attention from forward-looking advertisers and media planners.

7.1 AI-Driven Personalisation at Scale

The next frontier of CTV advertising is AI-driven dynamic creative optimisation (DCO) at the household level – serving personalised ad versions that adapt copy, visuals, offers, and calls to action based on real-time audience signals. Early implementations by major brands in the US and UK have demonstrated meaningful lifts in engagement and conversion rates relative to static creative. As the infrastructure for AI-driven personalisation matures, it will become a competitive baseline rather than a differentiator.

7.2 The Convergence of Commerce and CTV

Shoppable CTV – advertising formats that enable viewers to purchase directly from their television screen, save products to a shopping list, or receive a follow-up digital offer on their mobile device – is transitioning from pilot to mainstream in the US market and beginning to emerge in the UK and Australia. Amazon’s integration of Prime Video advertising with its commerce infrastructure represents the most advanced implementation to date, but all major platforms are investing in commerce capabilities.

7.3 Global Streaming Sports Rights Acceleration

The transfer of major live sports rights to streaming platforms will accelerate through 2027-2030, removing the final significant barrier to advertiser migration away from linear television. The NFL’s expanded streaming deals, the Premier League’s digital rights portfolio, and similar developments across cricket, rugby, and tennis in the Australian and UK markets will progressively close the gap between where premium audiences are and where premium sports content is available.

Conclusion: The Floor Is Rising, the Ceiling Is Still Distant

Linear television is not dead. Its decline is structural, however, not cyclical – and no single event, ratings spike, or content success will alter the fundamental trajectory. Its global market share has contracted by 70% in thirteen years. Its audience is ageing and shrinking. Its ad load remains high and its measurement weak. These are not temporary conditions.

Connected TV, by contrast, is growing at twice the pace of the broader advertising market, with precision targeting, real-time optimisation, and outcome-based measurement built into its architecture from the beginning. Programmatic buying has made it accessible to advertisers at every budget level, from Fortune 500 national campaigns to local businesses targeting their own postcode.

The arbitrage opportunity – audiences ahead of ad dollars – remains real in 2026, but it is narrowing. The advertisers who are accelerating their CTV investment today are buying premium inventory at current prices, building targeting and measurement capabilities that take time to mature, and establishing platform partnerships before competition for the best inventory intensifies.

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