Holy crap, this video is terrifying. From the narration:

We have been through economic revolutions before, but the robot revolution is different. Horses aren't unemployed now because they got lazy as a species; they're unemployable. There's little work a horse can do that do that pays for its housing and hay. And many bright, perfectly capable humans will find themselves the new horse: unemployable through no fault of their own.

(H/t Kottke.)