Apple, in the developer-focused video titled "What's New in watchOS 26," revealed a groundbreaking architectural upgrade for the Apple Watch. Specifically, the Apple Watch Series 9, Series 10, and Apple Watch Ultra 2 will transition from the arm64_32 architecture to the full arm64 architecture. This shift signifies that these models will now benefit from an expanded memory range, enhanced performance capabilities, and improved compatibility with the universal ARM computing standard. Given that all other Apple platforms have already adopted the full arm64 architecture, this upgrade ensures that the Apple Watch aligns seamlessly with Apple's broader ecosystem.