Gearheads will refuse to let go of their cars. They love driving and maintaining their vehicle. They'll argue that no robot can drive better than they can, no matter how wrong they are.
Imagine a world where police no longer pull you over for speeding, running red lights, or other traffic infractions. The legal fight will be huge, as those easy revenue sources suddenly disappear.
There are hundreds of more fights and scenarios like this we haven't even begun to imagine, that will tie up progress in the courts for decades.
We're going to need a concentrated force focusing on this tech as the next thing we are going to do, and able to get out in front of these issues. Right now, I see autonomous driving as a thing that a few groups are seriously working on, while everyone else takes a passive stance, or dips their toes into the idea as a passing fancy and not a serious milestone to tackle. We need to move it past a novel toy, and in to a serious undertaking that we all need to be vested in shaping the future of.
Because in my opinion, the automobile is the most efficient and prolific human killing machine we have ever invented. I feel autonomous driving is a step toward fixing that issue.