Luke's Arm
Not that I have ever wanted my arm to be cut off, but I just read about a new prosthetic arm modeled on the one that Luke Skywalker was sporting in Star Wars. The new generation of prostheses seems to be more closely approaching the functions of a natural arm. Coupled with the news of better than Olympic level runners, this could mean a whole new life for many people sidelined by sever injuries to their limbs - that is, if these prostheses can be made cheaply enough.