Technology
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I got to try messing around with a Hololens a couple of years back. The hand tracking wasn't perfect but it was pretty cool. It read my "typing in the air" gestures to set a WPA2 key very accurately (much to my surprise). The parameters of the demo I was playing around in (picking up and moving virtual packages around in a model city to control drones flying around that part of the convention center) was pretty cool.