Video link Frankly, it's astonishing how sophisticated they've gotten. The fact that they even CALL the prosthetic arm the 'Luke Arm' is just icing on an awesome cake.
The holy grail of prosthetics will be when they can be powered solely by the human body, like Luke's. In the meantime
That is just so incredibly... incredible. A little voice at the back of my head keeps saying "yeah, this is probably how the Borg got started."