Programmatic display spend to hit $436B by 2026 as attention metrics mature

The transition from retargeting to attention-based prospecting marks a critical pivot in programmatic monetization. For streaming platforms, this validates CTV as the primary high-attention surface, capable of sustaining higher CPMs through metrics like Adelaide’s Attention Unit (AU) rather than basic viewability. As advertisers hit frequency ceilings on the open web, the ability to activate programmatic TV inventory through contextual and semantic signals will differentiate premium publishers from commodity display. Watch for major DSPs to integrate real-time 'attention scores' as a standard bidding currency to replace the volatile third-party cookie.

The shift toward attention metrics is accelerating as legacy identifiers face structural decline. Per eMarketer in March 2026, global programmatic ad spend is now forecast to hit $725 billion this year, with US CTV specifically projected to reach $37.95 billion. This growth is coinciding with a historic shift in investment; eMarketer reported in June 2026 that US CTV upfront commitments of $17.73 billion will exceed primetime linear TV upfronts for the first time. This transition is pressuring streamers to prove that 'viewable' impressions equate to actual human engagement to justify the premium over linear costs.

While Google reversed its plan to fully deprecate third-party cookies in April 2025, the industry remains volatile. Per Usercentrics reporting in late 2025, browser-level controls and a new 'user choice' model in Chrome have still led to shrinking addressable pools, particularly on Safari and Firefox where cookies have been restricted for years. This fragmentation has driven the fourfold increase in attention-measurement adoption. Adelaide noted in its January 2026 Outcomes Guide that premium SVOD placements often score significantly higher AU ratings than FAST app mid-roll pods, signaling that environment quality is becoming as critical as audience data.

The regulatory landscape is further complicating identity-based strategies. According to reporting from Cookie-Script in June 2025, the UK’s Competition and Markets Authority continues to monitor Google’s Privacy Sandbox APIs for anti-competitive behavior. These pressures are moving the market toward curated supply paths. IAB Europe data from early 2026 suggests that while open exchange spending is dipping, private marketplace deals are rising to 42% of transactions. Brands are increasingly prioritizing these 'cleaner' pipes to avoid the estimated $84 billion lost annually to global ad fraud, which disproportionately affects non-curated programmatic display.