How is that suposed to work? consoles and PC are becoming similar, but there's no way MS goes his way on creating an Xbone emulator on PC.
games will all run on a Virtual Machine in ONE so essentially they could make an emulator... next, next gen it could run on tablets or whatnot and probably the next next machine pretty easily, possibly so yes, long term why would they not want to keep you invested in your investment in their ecosystem like iTunes store.
Next next gen comes and you can play every ounce of digital media you own on it? no brainer to stay there