A slightly bulky device wore around your neck, enable you to access computer, take photo, make phone call, and check out book on any surface with just your finger. Remember how cyberspace was access in the movie Johnny Mnemonic? Something like this.
Watch the video demo here – (Video)
(Link)I New Idea Homepage, SixthSense wearable data interface from MIT
The only down side is wearing that seemingly stupid color tag on your fingers.