This is another example of how all the most useful technological innovations result not by mimicking human (or even biological) capabilities but by taking advantage of the technology's own non-human capabilities to serve human needs. Computers (just lots and lots of 0s and 1s, not "thinking"), planes (air foils and jets, not flapping). We have robots that can build entire cars from scratch, but they don't look human, while we struggle to make a robot that walks upright (and then squeal in delight when we kinda sorta succeed). Basically, all the science fiction writers got it wrong.
I don't know about you, but I'm already planning my freak accident in which I lose both arms.
thx
(And Cienna: "more cheap"? How about "cheaper"?)