<ul data-eligibleForWebStory="true">With iOS 26, UIKit gains SwiftUI features like automatic observation tracking and updateProperties().Automatic Observation Tracking: Swift's @Observable now works in UIKit, auto-tracking changes.Basic Observable Integration simplifies setting up observed properties in UIKit.Collection Views: Cells can now automatically update with @Observable properties changes.Introducing updateProperties(): A new method in UIKit for fine-grained property updates.updateProperties() brings benefits like improved performance and separation of property updates.flushUpdates option enables seamless animations with automatic observable updates.Backwards Compatibility: Automatic observation tracking works on iOS 18+.Performance Tips: Cache computations, avoid retain cycles, and keep updates on the main thread.The Big Picture: A major shift in UIKit-SwiftUI interoperation for a unified development experience.