Before I go on, let me say that I think VR will be the future, I am excited beyond belief about some of the games that will be possible and I am making my own VR project outside of work in Unity and that I will own whatever devices are out there.
I still think there is a tough road ahead for full VR AAA development. I work for a games studio, and I know that the powers that be would probably not put a full 40 mill budget into developing a VR game because the user base will not be huge, as in, you are already competing hard for a share of the market and that's just for people . Even in years to come when the install base is much higher, some games simply don't work in VR, and some people simply won't like being in VR, or want to stick with a traditional view. That isnt to say, you could still have a 3rd person game that you play in vr, where the view is essentially pivoting camera that you can view in 360 degrees, Some hard work and thinking could solve it, I just know that it will be a hard road ahead...and whilst it will be for me it won't be for everyone,,
I can see it becoming mainstream when they make Avatar Movie in full VR, or Pixar do something in VR,
I am really glad that the momentum seems to be favorable at the moment,