The biggest Issue i've seen is eye fatigue from changing focal points between virutal and real items as well as stationary objects locked to the displays. It's

The biggest Issue i've seen is eye fatigue from changing focal points between virutal and real items as well as stationary objects locked to the displays. It's been a while since i've seen some of the tech but the best way i can put it is stare at the center of your tv screen, don't move your head, only move your eyes. That feeling of strain is what is amplified. I think it's going to need to be a more gradual phase in of the tech rather than putting all the info on display they were trying.