The WWDC announcements I'm most excited about are the new Foundation Models framework (for accessing Apple's on-device LLMs) and the Containerization framework for running Docker-style containers without hosting them all in a single Linux VM - here's links to relevant docs for both of those: https://simonwillison.net/2025/Jun/9/apple-wwdc/
@simon I keep thinking they should have MCP for Shortcuts. Feels like the thing that could fix Apple Intelligence