I wonder if turning off the HUD in the SRV would help with motion sickness - as long as you're just out for a Sunday drive and not collecting materials. My problem is going cross-eyed when the HUD, projected out in front of the SRV, intersects with the ground.
This is it for me. All holographic HUD elements should be set at the same distance, to match the distance to the front of teh SRV canopy. I think that would solve a lot of problems.