All of those things. With current headsets you'd need to losslessly stream 1200p video at 90fps which is a lot of bandwidth and those numbers are only going to

All of those things. With current headsets you'd need to losslessly stream 1200p video at 90fps which is a lot of bandwidth and those numbers are only going to increase. It also has to be very low latency and not skip/stutter to avoid motion sickness. Hopefully we'll see it in consumer headsets in the next 5 years.