It'd be nice if we could get to the point where my self-driving car is earning cash as a taxi whilst I'm doing my 9-5.
Adoption in the suburbs will still be much slower, but mostly because unused car storage is so much less of a headache out there.
I suppose you could own a driverless car and have it continuously deployed as an income-producer moving other people when you're not using it. That creates a lot of additional headaches and problems, though. E.g., how to make sure it's always available whenever you decide you want it? Or, will it be safe to leave your items in the car when it's used by others? (I would guess not).
Sort of like how you couldn't open your own payment processor for the few hundred people in your neighborhood today.