content: Its going to a gradual integration with the majority of the cars being still human driven. Nothing is really going to change except really lower insurance costs for people with autonomous cars at the start.  As for privacy, you travel is already not private. They have tech that is essentially a gigapixel movie of a certain area,  where at any frame they can focus on a car and it can show you the past and future travel of that specific car. You won't really loose anything by making the GPS data open, and you will gain way better traffic optimization.