I think self driving cars are clearly the future. There's just too many benefits. Instead of driving home a little too drunk or too tired, you just get in the car and it takes you home. Your parent gets too old or is disabled, just get in the car and it will take you there. Do you have someone in the family that refuses to drive in the metro because it's too scary. Not an issue. Did you forget something important at a family members house that's a couple hours away or do they need to borrow something you have? Just stick it in the self-driving car and send it on its way. For people that are physically disabled or wheelchair bound, you don't need traditional seat layouts in a self-driving car, so you can make the cars much easier to get in and out of. Or how about something as massive as eliminating jobs for people who's job is purely to drive around. If we could instantly go from a 40 hour work week to a 30 hour work week with this one technology (or whatever the number is). Or speeding up the efficiency of traffic that's on the road. Automated cars could all speed up or break together, speeds could regulated to smooth out traffic flow eliminating stop and go type traffic.
The not owning your own vehicle is a huge benefit for society as a whole. I would have to speculate that ride share type services would facilitate better carpooling as a system could better match up passengers to routes being taken. Plus with a fleet type operation, you'd probably have a reduction in how many unmaintained vehicles are out on the road. There's a lot of people that have to make the choice between repairing their vehicle and paying their normal bills, so they choose not to fix something.