This was a big issue when the likes of Wolfenstein 3D and Doom came out (in fact, one of id's own staff members would regularly have to lie down on the floor to

This was a big issue when the likes of Wolfenstein 3D and Doom came out (in fact, one of id's own staff members would regularly have to lie down on the floor to catch his bearings after a burst of play). I think it's just a case of a new immersive technology coming out, and people getting used to it. As someone else said, if the problem is less so for young people, then generationally it will become less of an issue as time goes on.