Unfortunately, we're more limited by PC hardware than by the technology itself. There's no reason we can't already have an 8k per eye VR headset if the graphics cards could run those resolutions on 2x8K screens @ 90fps each. One day though, the resolutions will catch up to the point where any higher resolution won't be noticeable, and that is when VR will be scary good!! I cant wait to play Aces High in 10-15 years.