I think it's pretty unlikely that we're going to see most of the market for family vehicles be turned into a short-term rental model. Some, perhaps! Cars-as-a-service will have some advantages over, say, ZipCar today (primarily convenience, some amount of cost as well).
But owning a self-driving car sounds pretty sweet as well. Not only will you be able to get the status symbol car you want, you'll also be able to leave your stuff in it (without paying extra to rent it for times you aren't driving). And it's better than the cars of today! You don't need to worry about parking! You can drive when drunk or tired! You never need to worry about your cars-as-a-service being unable to send you a car during peak times!
Cars are popular to own today. Self-driving cars would be more valuable to own than normal cars are today. You have to imagine immense benefits to cars-as-a-service for it to displace most of the market for self-owned cars.
But owning a self-driving car sounds pretty sweet as well. Not only will you be able to get the status symbol car you want, you'll also be able to leave your stuff in it (without paying extra to rent it for times you aren't driving). And it's better than the cars of today! You don't need to worry about parking! You can drive when drunk or tired! You never need to worry about your cars-as-a-service being unable to send you a car during peak times!
Cars are popular to own today. Self-driving cars would be more valuable to own than normal cars are today. You have to imagine immense benefits to cars-as-a-service for it to displace most of the market for self-owned cars.