If you're a fan of Windows 11, it's a big day. Microsoft has released the first build of Windows 11, clarified while (mostly) sticking to its stance on blocking pre 8th gen CPUs, and has also announced a new "Emulation Compatible" binary interface for Windows 11 on ARM, called ARM64EC. The new interface allows developers to transition their apps to run with native speed on ARM, even if they "dependencies or plugins that don’t support ARM yet."
The ARM64EC can "freely mix and match" between ARM64EC emulation layer and native ARM 64 by runnining ARM64EC in (parts of) an app, while any ARM 64 native code will run using Windows 11 on ARM's built in emulation.
Microsoft describes the benefits to developers in a blog post:
Developers can get started by downloading the latest Windows Insider SDK and the Visual Studio Preview. You can learn more on the blog post.