Apple has released iOS 27, watchOS 27, iPadOS 27, and visionOS 27 with Siri AI as the headline feature, offering an AI-powered overhaul of the Siri assistant initially in English beta, with support for five additional languages coming in October. The updates also include new UI features like Liquid Glass opacity sliders, updated app icons, improved widgets, and device-specific enhancements across iPhones, Apple Watches, iPads, and Vision Pro headsets.