VR will be the biggest change to gaming since the 3D/N64 era. Yes, there will be a lot of games that are in first person perspective and open world at first, but there will be other innovations as well. I have little doubt that developers are correct when they said VR will create entirely new genres.
In Mario 64, Lakitu (the guy on the cloud with the camera) is actually following you the entire game. Theoretically, this is the solution (at least at first) for third person games. You will be in that world as an on looker. Perhaps, they could make the character you're controlling your ghost or avatar.
There are other genre's that will benefit though, like God Games or top down games.
I can imagine a virtual room (in first person) is a hub and when you want to go to a different level, you select a different level that's laid out like a board game. You look down at the board game/level, select it and then the camera zooms in and you're there controlling your character from a top down perspective.
There's also the option of doing that virtual movie theater, but instead, you're looking at a virtual screen and playing a game.