tl;dr: Apple announced the Apple Watch Series 12, featuring a new S11 chip, an upgraded Health Sensing System with more accurate heart rate and HRV tracking, and a readiness score that feeds into a redesigned Health app with a "Longevity" tab and Health Age metric. New Audio Intelligence features (coming later in 2026) include Sound Recognition, Live Rewind (replays the last 15 seconds of conversation as text), and Siri Recap for conversation summaries, plus Siri AI powered by Apple Intelligence on the wrist. It starts at $399, with pre-orders today and availability September 18.