Just to pick up on this, it seems to affect people differently. I’ve never had a particular problem with airsickness, but I know lots of people who have. In fact back in the day (when this was all fields) if student pilots were suffering with airsickness they would be sent on a separate course aimed at increasing their tolerance by taking them up in a jet (Hawk in the RAF), taking them to the limit of what they could handle before vomming and then backing off. Again and again and again. If you think that sounds horrible then I completely agree, but I guess it adds credence to the idea of getting your ‘VR legs’.
Of course the difference in real life is that you get the ‘feel’ of the accelerations and rotations so there isn’t necessarily the disconnect that you get in VR (plenty of other problems though). Having a good external horizon helps, and being in control also seems to make people less susceptible. Certainly the times I’ve felt worst have been sat in the back with a particularly digital dude in the front.
It all gets a lot worse when you take away the external reference (like a dark night or in cloud), when it’s very easy to get spatially disorientated or for the body to get seduced by somatogyral or somatogravic illusions. That opens up a whole new kettle of worms where you can quite easily be convinced that you’re the right way up even if you are at some random attitude.
If it’s any consolation trying to play Skyrim VR made me want to hurl so much I haven’t dared put the disc back in over a year later.