Re: I'd be more shocked
People will still own their own and in fact will own more as people who can't drive will be able to use one.
I'll buy one, IF they ever work (as in it literally drives itself without me at the controls). My 3 hour 15 minute a day commute would suddenly become productive, and at a price point of say £20k, represents only the next 3 or 4 years season ticket.
Summoning one is unlikely to be cost effective for 80ish miles per day five days per week.
What it will do is kill off taxi drivers, truck drivers and car park attendants.
Train drivers too. There's no way to keep all that infrastructure running when people can pay about the same to be driven to work in a guaranteed seat, which is clean, air conditioned, and always on time. That's quite without the notion of changing public transport type several times on a convoluted route pre-determined by the public transport planners.
Depending on the flexibility of large employers, it could ameliorate rush hour a little, as with onboard wifi, I could work on my way to work, so set off a little later. Worst case I use the time to sleep, study, or relax in front of a movie.
I'll still keep my manual cars for fun driving, but commuting into London by car just isn't fun. And it's not a lot better on the train/tube.