Car manufacturers are way ahead of the law and ethics discussions that need to happen before this technology goes any further. Over the next year or two you are going to see a lot of additional clamping down of the technology by various authorities because these are discussions that are just starting to happen by those outside the auto industry.
In particular, things like the basic ethics the cars should be programmed with. Who does the on-board computer decide is the priority to keep safe? If an incident is about to happen, does the vehicle make a maneuver guaranteed to keep the driver safe, but could jeopardize other vehicles or pedestrians, or does it avoid third-party damage as much as possible, which may put you at more risk? If it picks in between, how does it do so? What criteria does it use?
These aren't decisions we want car makers making. Until these things are worked out, and regulated, truly automated vehicles are still a fantasy to go mainstream.
Car manufacturers are way ahead. The technology is there. A lot of Americans drive cars that have several autonomous features already, but not the majority. These features do make things more safe, but I think I said this earlier- more people need the cars with these features so we can get accustomed to them slowly, as more features come out- the more we are familiar with them.
My opinion though- we are several + several decades away from seeing fully autonomous cars as the majority of vehicles on the road.
The government is already imposing so many conditions on new vehicles being made..when a new body style comes out, old ones are grandfathered in.
Personally, I can not stand features such as Start/Stop. I purposely am driving a less fuel efficient turbo engine to avoid that feature.lol.
And I hate giving up the fuel economy, but avoiding my car shutting off every time I stop is worth it!