Fact: Google has a self-driving car. They're not the only one.
Fact: ZipCar is a business. They turn a profit.
Fact: This is ZipCar with cars that don't need to be at a garage or a curb-side parking spot within walking distance; it's essentially cabs without cab drivers.
Fact: The taxicab business is a thriving industry. This is in no part due to the wondrous experience of interacting with a cabbie, and almost wholly in part due to the convenience of a service by which you can have a car come and get you instead of navigating public transportation routes.
Argument given: it sounds fancy, must be a fantasy that can't happen in real life.
This is why somebody will be rich and it won't be you.