bionic

Yup, they've got bionic arms. Personally I thought hover cars would be befre bionic people, but what do I know.

This is pretty cool. They re-route amputees arm nerve endings to other muscle in the chest. Then take the signal from that muscle when it is triggered. The end result is that when the amputee thinks about moving their arm the prosthetic moves.

From CNN:
http://www.cnn.com/2006/TECH/09/14/bionic.arm.ap/index.html?section=cnn_tech#

At the moment it looks like they are using forward and reverse on a motor to do clenching and unclenching. So you need to think "relax" instead of it doing it naturally. I'd imagine future versions with springs to provide a certain equilibruim where your hand normally rests in that kinda half-curled position, or mimic how your arm naturally rests by your side.

Of course, much better minds than mine came up with this stuff.