Cyberhand!

At last, a bit of reassurance in an uncertain world. If worst comes to worst and you happen to say, have a hand lopped off, fear not! You can get a handy-dandy (ha!) replacement soon with dexterity and control closely mimicking the real thing. Apparently with some sort of electronic feedback it communicates back to the body and doesn't just take input signals. Official site here, Popsci review here, youtube video here.