The Short Version
Wear OS 7 announced with Gemini AI and 10% better battery life, but Google has not confirmed a release date or which Galaxy Watches will receive the AI features.
Wear OS 7 promises Gemini AI on your wrist and 10% better battery life, which sounds useful until you notice Google has not said when it ships or which existing Galaxy Watches actually get the AI features. Announcing improvements without a date or a device list is just a press release with extra steps.