A recent Windows 10 Insider Feedback Hub quest revealed that Microsoft is developing a new throwaway sandboxed desktop feature called “InPrivate Desktop”. This feature will allow administrators to run untrusted executables in a secure sandbox without fear that it can make any changes to the operating system or system’s files.
“InPrivate Desktop (Preview) provides admins a way to launch a throwaway sandbox for secure, one-time execution of untrusted software,” the Feedback Hub questions explains. “This is basically an in-box, speedy VM that is recycled when you close the app!”
This is the obvious way in which Microsoft could isolate any legacy Win32 applications in future non-Win32 versions of Windows.