iOS 26 introduces automatic state observation to UIKit by bringing SwiftUI’s beloved @Observable macro into the fold. Developers can now build reactive, state-driven interfaces in UIKit without the hassle of manually calling setNeedsLayout() or maintaining boilerplate update logic. With the new updateProperties() lifecycle method and built-in dependency tracking, Apple modernizes UIKit for a more declarative and performance-optimized development experience. Time to update your apps and embrace the future of UIKit.