The Short Version
watchOS 27 beta 3 adds a dedicated Siri AI app to Apple Watch Series 9 and newer, with conversation continuity across iPhone, iPad, Mac, and Vision Pro.
Siri AI finally lives on the Apple Watch as its own app in watchOS 27 beta 3, and for the first time you can start a conversation on your watch and pick it up on your iPhone, iPad, Mac, or Vision Pro without starting over. That's a bigger deal than it sounds, until now, Siri on the watch was a dead end. The Workout Buddy AI coach also cuts the cord: it no longer needs an iPhone nearby to run, fixing the most frustrating part of a feature that debuted in watchOS 26. Both upgrades require Apple Watch Series 9 or newer.