whats new in watchOS ?

At WWDC, Apple introduced several new features and updates for watchOS, particularly in watchOS 26 and watchOS 11.

Design System: watchOS 26 features a new design system with updates to materials and controls, including a fresh look with Liquid Glass. This design is applied throughout the OS, affecting app icons, system spaces like the Watch face, and the Control Center.
System Architecture: The new system architecture supports ARM64, which is used by Apple Watch Series 9 and later, as well as Apple Watch Ultra 2.
Widgets and Controls: Widgets can now receive push updates using APNs, and controls can be placed in the Control Center and Smart Stack. This allows for quick actions without opening the app.
MapKit Enhancements: New features for MapKit include searching for nearby points of interest and getting routes using different transport types, which can be displayed as overlays on a map with SwiftUI.

Live Activities: iOS live activities are now available on Apple Watch, providing a glanceable way to track events or tasks.
Widgets: The Smart Stack can now automatically display widgets when they are most relevant, using context clues provided by the app.
Health and Fitness: Enhancements in HealthKit and WorkoutKit include new APIs for mood or emotion data and custom workout types with distance and time goals.
Interactivity: Double tap functionality allows for new ways to navigate and take action within apps or widgets.

For more detailed information, you can refer to the sessions What’s new in watchOS 26 and What’s new in watchOS 11.