Excellent point about the importance of batteries, especially re robots. If Apple's building a car, what that really means is that they're building a robot. Ca

Excellent point about the importance of batteries, especially re robots. If Apple's building a car, what that really means is that they're building a robot. Cars are currently sized for human occupants. A robot car could be almost any size. In the first Star Wars, there's a tiny robot car which scuttles around the Death Star. The future probably holds millions of those things. Technically, this is a robot car: http://www.wired.com/2015/02/incredible-hospital-robot-saving-lives-also-hate/ http://www.wired.com/2015/02/incredible-hospital-robot-savin...