But more than that, most games won't work with a VR refit anyway. The whole experience needs to eb tailored. You'd need to start with a VR game and then work a 2D title from it.
I know this is the general direction conversation has been trending but I wonder how accurate it is. Games like ARK and Project Cars don't seem to have been designed as ground for VR or have made significant comprimises to the non-VR experience to accommodate it yet both natively support VR, and Alien Isolation while not the perfect VR experience was more or less modded to work in that way. Granted not all games (probably not even a majority) are going to be easily translatable into VR, but I think the conversion process may be easier than many are expecting and won't necessarily require a game designed from the ground up for VR (as long as they keep it in mind) or have to make huge compromises to the non-VR experience.