The oncoming of fully automated vehicles won't happen the way that being discussed in geekish circles. Governments tend to move with all the speed of a glacier, and insurance companies will go out of business if the number of traffic accidents plummet. (Yes, they will. Water conservation sounded great until a lot of people started actually conserving water, now the water companies are having to jack up rates to stay solvent.)
What will happen is that "safety features" will be added to top end vehicles and work their way down. This is already happening with rear-watch, lane obstacle detection, and others. Insurance companies will like safer cars, as long as they aren't so safe that they are no longer needed. Public safety groups will lobby for these safer cars.
The myriad of state legislatures in the US will be very reluctant to authorize fully automated vehicles. Instead, manufacturers will just keep introducing "features" that reduce traffic accidents, things like lane following and collision detection and braking. Then, as the number of features mounts, the distance between a fully featured safety car and one that will drive itself will become smaller and smaller until it doesn't seem like such a giant leap. In addition, we may find automated vehicles licensed only for certain pieces of highway. It takes a lot of CPU to automate a car, adding GPS is a detail.
Look around, the changes have already started.