[bentcorner]

> But just as Zipcars have presumably eliminated some car ownership use cases at the margins, fully autonomous cars would have a significant effect.

The big big thing I see about driverless cars is:

a) You can use it on-demand, even more easily than Zipcars. No need to physically be located near a lot, I can "hail" a driverless car and have it waiting for me when I need it. Smart routing and allocation can ensure that capacity is used smartly - it could drop somebody off while picking me up.

b) People who can't or won't drive can benefit from this. From young children to the elderly, transportation becomes much much easier. Have to take your kid to an appointment in the middle of the day? A driverless car can pick them up from school and bring them directly to the appointment and you can meet them there. You go to the appointment together, then driverless cars can take each of you back to your daily work, saving time all-around.

Yes - it's useful to have a car to keep stuff in. I can imagine you could keep one "on call" for a day out, and you can meet the car (at whatever exit is closest to you!) throughout the day to get supplies or drop things off.

Maybe I'm being too optimistic about what driverless cars can give us. Realistically I think hands-off driverless cars are within the next few years, but FUD and lawsuits will prevent more radical forward progress. It's certainly not unimaginable that it will take an entire generation of people to die off before truly autonomous cars are common and accepted.