What comes to mind on what games will work:
God games will make a comeback,
VRMMO's will eventually be made, but will be primitive in the beginning,
It will take a while, but RTS will also return with a lot of experimental UI's,
Themepark games will be made within two years of the headsets release,
Third person games will probably also work, it will be as if you are a spirit guiding the hero,
There will be a lot of experimentation with First Person games, hopefully stealth games similar to Thief will be made (Thief is perfect for VR).
This is just a few that came to mind, I'm sure there will be plenty of else that will work.