London restaurant delivers food by iPad-controlled quadrocopter

http://youtu.be/y9RKXO1rr7g&start=20

Yo Sushi, a restaurant chain that uses conveyer-belts to deliver food to tables, has now gone one step further: flying in trays on a quadrocopter controlled by an iPad. “Hold my beer and watch this” is something you might expect to hear in a restaurant from time to time, but not usually from the serving staff …