When AI agents handle product discovery on shoppers' behalf, the search-based advertising model that funds most retail media revenue faces an existential stress test. Is this a five-year problem or a five-quarter problem? RMNs and CMNs need to decide—now—whether agentic behavior represents a gradual shift or an accelerating disruption. This roundtable asks the hard questions: What happens to sponsored search revenue when humans stop searching? How do networks position themselves before the power shifts back to large platforms that are already agent-ready?