The liability question will be an interesting one--far more so than trolley problems IMO. There aren't a lot of examples where we just accept things sold to consumers killing people when used according to directions and properly maintained because "hey, sometimes stuff happens." Drugs are probably the best example. But even that isn't a case of your drugs killing someone else.

I do think it will figured out in some future where there's true autonomy and they're proven far safer statistically. But you're right that the general public isn't going to shrug when $AUTOMAKER's car runs over a skateboarder and the company says "We are committed to safety and we'll try harder next time."

There's also the uncanny valley when no one's paying attention although they're legally supposed to be.