I just started thinking about scenarios like detours, construction zones and narrow streets where two cars can't physically pass each other and how a self driving car would negotiate those. I noticed the self driving car got kinda stuck behind a moving truck in the video and two other cars went around it. Also I'd assume they would be programmed to drive the speed limit on the highway when lots of times traffic is moving around 75mph.
I heard something recently about how so many inventions seem ridiculous to an able bodied person because we don't think about the people they are intended for and they don't show people with disabilities in the advertisements.
This all reminds me of the autonomous off road driving challenge from DARPA over 10 years ago:
http://vision.ucla.edu/papers/jonesFFKWRM06.pdf