Buying a car today is like buying an iPhone with no App Store, or a laptop that will only run Windows 8. Ever. What happens when you need a software update? Back to the dealer. What if you want the car to give you directions? Hope you brought your smartphone (or bought the navigation package). But the self-driving car of the future? Remember how cell phones used to be just for making phone calls? Get ready for a future in which cars used to be just for getting you places.