60Hz is the low bar which is why most are targetting 90Hz (Valve, Oculus) or 120Hz (Morpheus).
Yah, I'm just saying they've got to be really careful about framerate. It's kind of crazy how fast the motion sickness hits you. It's not a gradual thing. It's instant. Anything below 60Hz is definitely a bad idea. Sounds like some of the morpheus games will be 60Hz, and they have to be spot on. The good thing is, on a console, you can make sure the game is perfect.