Re: I'd add to that line of thinking:
"It shouldn't be expected to, and in these early generations it just needs to be be close to a human driver, and work in a complementary fashion with one."
Except you need to take human nature into account. Although it's still devastating for the family of anyone killed on the roads if a human is driving it's either an unavoidable accident or there's someone to blame and hopefully be punished. When it's a "machine" that kills someone, how do we accept the "unavoidable accident" when it was the "infallible computer" that did it or choose who to blame or get punished?