re:Invent 2025 Day 4: The Infrastructure Behind Agentic AI
When the curtain lifts on infrastructure, you understand why AI has a future at all.
There is a rhythm to a Peter DeSantis keynote.
You sit down expecting a product announcement, and you end up holding a degree-level lecture on why the future of AI rests on the parts nobody sees. This morning at reInvent was exactly that. A full room, a quiet intro, then straight across the boundary between computer science, silicon strategy, and the economics of AI.
