The problem with the Index is that it wasn't made for sim fags. It's made for le epic roomscale waggle which to be fair is the most immersive use of current VR tech since you have your hands in the virtual world and the perceptual feedback loop multiplies the immersion. That's why it's 120-144 Hz and it costs $1000 instead of being just 90 Hz but higher resolution and $600. If they had used the HP Reverb displays, we'd get a really, really good sim experience.