How does it not increase the enjoyment? Just about any game can benefit from it. It's just a matter of how it's done.
A good example of this, is you would expect RTS games to be bad for VR because it's all 3rd person. Ya, if you where to take the games as they exist now and throw it into VR .. it simply wouldn't work well. However, you could take that RTS game and place it on a VR table or something similar. So you are a god looking down at a table or a planet or whatever it is that will make it work in VR. Heck you could even make it like a holographic experience, like something you would see Tony Stark using.
FPS games are another good example. When you port them straight over to VR, it will get people sick and it just wouldn't work well. For a FPS game to work, things need to be changed to be more realistic. So instead of you being able to run at like 20 mph bunny hopping everywhere, you should only be capable of doing what you can do in real life. Other wise ... well you risk getting sick. Though you still can stretch what you can do in real life and still be safe. Just have to be careful.
I say give it some time. VR most likely can improve just about all games, it's just a matter of how and when.