I agree that they won't be everywhere, but I can see them changing inner cities very quickly. Where I am, in NYC, your bang for buck (in terms of people per square mile) is huge, the street grid system is clear... it could change the taxi and parking industries very quickly.
The only problem is a legal one - it's inevitable that at some point a driverless car will hit someone. Even if the total number of pedestrian collisions drops dramatically (which I'm sure it would) the questions of responsibility and culpability become a problem.
The only problem is a legal one - it's inevitable that at some point a driverless car will hit someone. Even if the total number of pedestrian collisions drops dramatically (which I'm sure it would) the questions of responsibility and culpability become a problem.