The idea that we are going to get robotic vehicles anytime soon is a peculiar delusion that seems to have infected all of Silicon Valley. It started out with your typical tech company BS marketing hype, but now it seems that dozens of tech companies that ought to know better have drunk their own kool aid.
Sure, getting a car that can drive itself seems easy for the first 90% of the job, but the remaining 10% is not just incredibly hard but nearly impossible. Making a car that can safely drive through city streets is very much an AI-complete problem.