I was stuck in traffic yesterday, which I didn’t really mind because I have a fun little yellow convertible, and I was thinking about Uber ($17 billion! – that’s the company’s valuation, not the price of a ride) and Google’s driverless cars (development cost unknown), and I decided it was time to connect the dots: once a car learns to drive, there’s no need to own it and there’s no need for a driver. That’s because the car can come when called, take you to your destination, then go off and pick up someone else. That sounds great and