Only a 2.2 second in increase in TTP[1] on the roller coaster sim, is that really statistically significant? And why don't you get sick when you are flying in your dreams? I find the area of research pretty interesting and the stories told of the development in AR goggles at Valve really humourous (in a gross sort of way) but it reading things like this it always feel like we're missing something fundamental here.

[1] Time to puke