Build on that. Boot to that os or emulator when you start up PC. Basically stop running anything else while gaming. Doesn’t seem to difficult to do on the future.
Especially when Xbox runs an emulator to run old games.
Honestly it’s probably the best idea going forward. Once you build a game for a single os or emulator. Then you can just port the emulator over in to everything. Hopefully means optimisation would be far better. Don’t need to run 4 or 5 different things. Just one and make it run on Nintendo Microsoft PC and PlayStation