Game ideas keep hitting me but most are out of the realm of possibility for me
Dog/Dragon/Raptor/Chupacabra Trainer - (would require someone with some damn good AI programming chops. Basically Milo in Dog or (enter animal here) form. You would be standing in a VR Park (or enter other location here) and your intelligently programmed AI buddy would play with you.
You could teach it tricks, play fetch, or frisbee, or toss entire cows, and just generally spend time with a virtual animal.
If the AI is good then emotional attachment could happen, which would be pretty cool for psychological reasons.
Dungeons and Dragons - Sit at, and bring, your real life table into VR and play Old school D&D with star wars holograms (your friends) sitting around it. Custom locations, possibly star wars hologram chess like mechanics.
VR Golf - play real courses (using teleportation to move around), fake ones (moon, volcano, etc) or build your own using the wands in a custom editor.
Extreme Swing League - Spider man, meets basketball suspended in mid air. Need I say more?
Post Apocalyptic Battle Cars- 2v2v2v2 in big open worlds. Interstate 76 gone insane. One person drives and fires the car's weapons, the other person is standing in the open bed of these el camino like monster cars and fighting using traditional guns (a la hover junkers). (Got the idea from the new mad max game)
Home run derby VR - this is a no brainer.
Pokemon - Uhh, I mean, isn't VR perfect for throwing orbs in a ring and letting AI fight it out?
Battlestations - multiple players take different positions and work together to make a giant battle bot work. Fight against other battle bots (sorta like a weird moba).
and a few I am keeping to myself