The difference is that desktops get updates, while on Android is more of wishful thinking targeting latest versions, unless one just targets Pixel and Samsung flagship devices.
Win32 sandboxing is orthogonal to the store.
UWP is not about the store, people keep mixing this up, as it unfortunely refers to multiple things across the Windows stack.
UWP is also known as WinRT, UAP, or just modern COM. And sandboxing UWP applications doesn't necessarly require delivery via the store. Any MSIX package will do.
What Microsoft is now doing (officially as of Reunion) is detaching all this tech from the kernel and have them as userspace APIs, across multiple Windows versions, and merging the UWP and Win32 stacks into one, hence Project Reunion.
Sandboxed Win32 applications don't need to be store only.
Win32 sandboxing is orthogonal to the store.
UWP is not about the store, people keep mixing this up, as it unfortunely refers to multiple things across the Windows stack.
UWP is also known as WinRT, UAP, or just modern COM. And sandboxing UWP applications doesn't necessarly require delivery via the store. Any MSIX package will do.
What Microsoft is now doing (officially as of Reunion) is detaching all this tech from the kernel and have them as userspace APIs, across multiple Windows versions, and merging the UWP and Win32 stacks into one, hence Project Reunion.
Sandboxed Win32 applications don't need to be store only.