Here's something cool that Microsoft just cooked up in its lab. It's a think you wear on your wrist which captures the position of your hand in 3D and translates that into software commands. So you can do the whole Tom Cruise Minority Report thing with just your hand -- work with documents, move stuff around, turn up music by twisting an imaginary knob in the air, play video games . . . . all while wearing a little device the size of a wristwatch. It's just a prototype right now, made with off-the-shelf parts, which is why it looks a little clunky at the moment. But take a look at something called Digits, and imagine how many ways this thing will be useful:
