I can think of a few milestones in the future for AVs:

  * the first accident between two fully automated AVs.
  * the first such accident within AVs from the leading company.
  * the first fatality in fully automated AVs
  * when uber or lyft or any similar company starts to use AVs more than human drivers in a metropolitan.
  * when a city gets half the driving hours in AVs.
  * when human drivers no longer get insurance coverage by a major insurance company.

I wish the order in reverse.