I see most the arguements are you can't just rack on VR, but what if you made it based on VR, then stripped it down for non Vr?
The main thing about VR is able to move the FoV by turning your head so you can see beyond where the cursor is. The second thing is controls and like most games these days you can remap controls.
Naturally it won't work with all games, and that's a given, but that don't mean games where it can be done shouldn't be revoked.
Games like Rez Infinite was originally a non VR game. Games like time Crisis, Rush of Blood and other games in today genre could easily benefit from having two modes.
Even games like top down bullet hell shooters and side scrolling shooters could receive a VR treatment and work perfectly without it.