“The foundations that CMOs once relied on are rapidly eroding, from the way teams operate to the way brands earn trust and drive growth,” write Sharon Cantor Ceurvorst and Ewan McIntyre in “Leadership Vision for 2026: Chief Marketing Officer.” “In 2026, CMOs face a crucial choice: deploy AI on legacy systems and risk irrelevance, or embrace the opportunity to build what comes next.”
These developments are the result of changes in trust, customer behavior and operational dynamics. At the same time, AI, cross-functional collaboration and market volatility are driving marketing to take on more responsibility without new resources.
Crisis 1: The zero-based channel shock
At the heart of the first crisis is what Gartner calls ‘the zero-based channel shock’. The finding is counterintuitive: the most widely used and historically most effective digital channels are now the least stable.
Channels like search, display and social media – cornerstones of modern marketing investments – are facing increasingly rapid obsolescence. This is partly due to how generative AI is fundamentally changing the way customers search for information, discover brands and make decisions. What replaces the human-driven marketing journey is an “agentic” one: where AI-powered tools perform tasks on behalf of customers and mediate their exposure to brands.
Dig Deeper: How AI Just Destroyed Marketing as We Know It
This shift not only challenges channel tactics, but also the logic of decades of marketing strategy. “The digital channels most at risk from AI disruption are those with the highest historical spend and impact,” the authors write. As a result, CMOs must now build their channel strategies from scratch, using a zero-based approach that doesn’t assume the past predicts the future.
Instead of focusing on increasingly saturated channels, CMOs must refocus their efforts on where discovery is happening now: AI-powered tools, recommendation engines, and ecosystems where human attention is fragmented and filtered by machine logic. The report states: “CMOs must let go of old assumptions and refocus on rapidly evolving, AI-driven buying journeys.”
In this new environment, marketing success will depend less on channel dominance and more on adaptability, experimentation and building trust at machine-mediated touchpoints.
Crisis 2: Personalization has the opposite effect
The second crisis goes to the heart of marketing’s value proposition: delivering relevant, personalized experiences. After years of investing in martech platforms, CDPs, and data-driven personalization strategies, CMOs are now faced with a sobering realization: personalization, as currently practiced, isn’t working.
Worse still, it undermines customer confidence.
According to Gartner research, the customers who experienced personalized interactions were:
- 3.2x more likely to regret a purchase.
- 2x more likely to feel overwhelmed by information.
- 1.7x more likely to postpone making important decisions.
This finding goes against industry orthodoxy. For years, marketers claimed that deeper personalization would increase engagement, satisfaction and loyalty. Instead, Gartner reveals a personalization paradox: the more brands try to simulate intimacy with algorithms, the more they risk alienating customers.
Dig deeper: This is what your CMO is dealing with. How can you help?
“AI can fake intimacy, but it cannot build trust,” the report states. What is needed now is not more refined targeting or automation, but a rehumanization of personalization – based on empathy, transparency and clarity of purpose.
Gartner recommends a strategic pivot: CMOs should design “dual customer journeys” – one that influences the AI systems customers use (such as voice assistants and recommendation engines) and another that involves humans in evaluating the outcome. In this model, AI becomes an interpreter of value, not a replacement for authentic connection.
To move forward, marketers must recognize that trust is not a data artifact; it is a fundamental aspect of human interaction. It is earned through meaningful experiences, relevant context and human consistency.
Don’t plug AI into outdated thinking
These twin crises are symptoms of a deeper problem: the continued push to retrofit AI into outdated marketing strategies. Gartner’s overarching message is clear: AI cannot be treated like a plug-in. It requires a re-architecture of marketing activities, talent and culture.
This starts with leadership. The report argues that future CMOs will lead by strategic insight rather than operational execution. They will guide their organizations in building “AI-powered marketing organizations” with new operating models, hybrid human-agent teams and AI-native processes that create value through differentiation – not just scale.
Crucially, this evolution also calls for a new internal story. As AI-generated content floods every touchpoint, CMOs must ensure their brand voice rises above the noise. Gartner warns that, if applied poorly, AI risks creating “a competitive sea of sameness.” CMOs must resist the appeal of generic efficiency and instead use AI to amplify differentiation, creativity and customer-centric innovation.
The path ahead
The message for CMOs is as urgent as it is nuanced. Doing nothing is not an option. Leveraging AI on outdated channel plans and failed personalization tactics will only accelerate irrelevance. However, a strategic, human-centric approach to AI offers the opportunity to build the future.
To achieve that, CMOs must:
- Rethink channel strategy from the ground up.
- Redefine personalization to emphasize empathy over automation.
- Build organizations designed to thrive in an AI-mediated world.
- Use AI to amplify (not erase) the brand’s unique voice.
- Lead with strategic clarity in a time of disruption.
AI may be reshaping the landscape, but the opportunity remains for CMOs to lead the future, not react to it. The key is to stop defending outdated tools and start designing a marketing function that’s built for the realities of 2026 and beyond.
Energize yourself with free marketing insights.
MarTech is owned by Semrush. We remain committed to providing high-quality reporting on marketing topics. Unless otherwise stated, the content of this page was written by an employee or paid contractor of Semrush Inc.
#CMOs #face #makeorbreak #moment #digital #channels #personalization #collapse #MarTech