Comment by pjmlp

It is a bit more than that, and I bet with Windows 11 announcement we will get a more clear picture on it.

It is also a way to bring into Win32 side most of the API that really matter on the UWP side of the fence, most likely (although they are yet to confirm this) as migration path to UWP developers.

.NET Native, C++/CX are pretty much dead, and C++/WinRT keeps missing many of the tooling available on C++/CX for XAML applications.

So I expect them to migrate the APIs into an OS version independent layer, and then give the mercy shot on UWP apps.