It just has to be a wearable computer.
But a bit disappointed you guys went "hardwired", WIFI would have been better, would have allowed wearable networking devices, plus it would be easier to use in education.
Currently the students would be tied to the LAN cables, kids and cables don"t mix, with WIFI (without the need for a USB dongle), it would really open up the device.
I like the sound of that, I wondered for a while what you could get from it that a smart phone couldn't do..
Combining many of the other idea's on this thread and the video glasses linked below. Watch films, check on the car, the baby, the stranger at the front-door and the burglars attacking the shed.. all without having to move from the sofa once