>>274673358
Most of VR sickness after you've gotten over the first hurdle is when the games take away your camera control. Japanese still get motion sickness from FPS, or so I've heard, so I guess watching someone else play is like having the game take control away from you, and the movements aren't small when they are dashing their head around.
There is this loop stage in Redout, it doesn't make me sick, but when I focus a lot it is kind of disorienting to watch your PC screen go around in circles like that.