I actually think pixel density is one of the easier battle to win. Getting a cheap, lightweight, strain-free device to users is the real requirement. For now,

I actually think pixel density is one of the easier battle to win. Getting a cheap, lightweight, strain-free device to users is the real requirement. For now, I can't handle more than ~30 mins with any VR/MR/AR device, but if I can actually wear one for several hours and be productive using one - I will be convinced we've turned the corner on this tech.