These lists are always fun. This list summarizes the projections in Technology Review. They touch on things like the open iPhone and nano radio - but I saw on YouTube the other day a demonstration of a telephone that transmits thoughts, not voice (it basically maps neural impulses being sent to your vocal cords to a vocabulary of pre-recorded audio). Implant micro-receivers, and you have completely unobtrusive telephony - your students could be chattering with each other, and you can't do a thing - they are thinking at each other. Of course, by that time, the idea of forcing students into a classroom to sit down and shut up will seem quaint (or so I hope).