Oh, yes, I did forget one of the few drawbacks to VR; motion sickness. When I am out in the SRV I can only drive it for short periods, otherwise I will be sick. There is an option in the Graphics menu to lock the view to the horizon, and it helps, but it does not eliminate said motion sickness. I have been told (but have not yet had enough time to confirm it) that over time you do get used to it.
The issue comes about as your true sense of balance (the inner ear) does not tally with what your eyes are telling you, and your brains' sense of balance gets confused.
In spite of this, I will continue playing ED through the VR headset. The game is totally different than when played via a monitor setup. If you are under attack, you can physically look for your attacker (spot them on the sensor disc, and then look in the relevant direction), without having to wait for them to hove into view on the monitor. It certainly helps in combat (and is now only restricted by the view through the cockpit Perspex).