Maybe I'm naive, but is this really different than today? Let's say Volvo implements some new kind of crumple-zone tech that drastically reduces fatalities in head on collisions, and patents the tech. Is this a big ethical problem?
I think the distinction here is that failure conditions in current vehicles are almost entirely human caused, so that new safety tech only matters after a human has already made a mistake. With autonomous cars, humans aren't making mistakes anymore, software is.
So essentially, we're looking at transitioning from protecting people from themselves, to protecting people from the machines. Which is something we FEEEL very differently about, even if the big picture isn't all that different. I mean, it's certainly something that changes the dynamics of liability, that just a matter of of who's paying the insurance bill.