Actually, I think the holographic wrist device could be done with a pair of augmented reality glasses and a wristband with a little AR marker on it for orientat

Actually, I think the holographic wrist device could be done with a pair of augmented reality glasses and a wristband with a little AR marker on it for orientation. Of course, you'd be the only one able to see it (unless you're linked up with other people with the same glasses). Actually, that brings up an interesting idea. If a lot of people have AR glasses, they can all experience a shared reality with all kinds of crazy "holographic" stuff flying around. Of course, it's going to be weird for the people who don't have the glasses.