The biggest problem with the cars is the enormous amount of floor space they take up. It doesn't really matter if the car is driverless, runs on rainwater and can rustle up kebab if it can't move because of all the other bleedin' cars cluttering up the road.
Getting people out of cars and onto public transport, bikes or their own two legs would do a lot more for city life than driverless cars. Making people pay for their parking spaces would help too - where did this idea come from that you can just dump a great lump of metal on the side of the public highway? If you are going to block half the carriageway then make it a bus lane (or even better, a tram line), rather than an unofficial car park.