Forget about curing cancer and diabetes. The real way I know that we have come a long way as as a civilization is by this saxophone-playing robot. Before you try to think of why the world would need a saxophone-playing robot, try to imagine the world without such a robot.
There is no word on how this robot came to be; how he learned to love the saxophone, or where his passion for the brassed instruments came from, but if you click through there is a video of it tearing up John Coltrane's "Giant Steps." Via Techeblog