I do have to admit, one thing that I read about Windows 8 that I thought was kinda cool is that programs can have Metro and desktop interfaces compiled into the same executable. With "dockable" tablets becoming popular, I could appreciate walking around using Metro and having my screen and running programs automatically flip into desktop mode when I got back to my desk. Something about that struck me as Amiga-like. In the UI Style Guide, Commodore encouraged developers to include Shell, Workbench/GUI, and ARexx interfaces in their programs, to allow users to work with whichever interface they felt most comfortable.
It was some time ago that I read about this feature for Windows 8, maybe even during the public beta. I don't know if it's still even true. It certainly doesn't seem to be widely promoted or encouraged.