as long as there are cars on the road whether they be computer operated or human, there is always room for something to go wrong, so the insurance will always be there. Rates may be lower, but it will still be there.
And someone mentioned about a trucker worried about this affecting him in the future, it could.. but also look at locomotive transportation, trains use to take a lot of human interaction to keep running, but now they are mainly computer operated... but they still do require people on board to keep track of the equipment to ensure the load gets there safely.
One thing I got to thinking of about this car, what about winter driving? On icy road conditions? Not sure I would trust a computer vs my seasoned instinct, but then again they may have already tested in such conditions.