There is an article on Polygon.com about the Oculus Rift people working to solve reverse motion sickness. Polygon claims this is THE major obstacle for the Rift. I am certain it is a problem. I certainly am hearing more people mention motion sickness in reviews of the Rift. Whether it is THE problem or not I am less sure.

As the article points out, motion sickness is about our sense detecting motion that our eyes cannot see. This is like being below deck on a rolling ship. You can feel the roll. But, the room appears stationary.

