Elon Musk has said that he thinks not of building cars but of building factories that make cars, the machine that makes the machine. You can see what he is on about in this new video of the first Gigafactory.
Three points of note. The factory was up and running in 10 months. There are lots of robots, in a factory in China–that tells you a lot about Chinese wages and the productivity of robots today. Tesla is building Gigafactory Berlin and Gigafactory Texas next.