tl;dr: Apple's iOS/iPadOS/macOS 27 centers on "Siri AI," a rebuilt assistant with personal context, onscreen awareness, and Camera/Visual Intelligence integration, launching in English beta with more languages in October (excluded initially in China and partially in the EU). Apple Intelligence expands into Photos (Spatial Reframing, Extend), Image Playground with SynthID, Safari tab organization and change notifications, and Call Context. The release also touts performance gains—up to 30% faster app launches, 80% faster AirDrop, 5x faster iPad file transfers—plus updates to Health, AirPods, Maps, Apple Watch, Vision Pro, and Apple TV.