OK, I read the comments on this thread and honestly folks, this reminds me of 100 years ago. The same statements were made about the "dangerous automobile machines." They went to fast and made the roads dangerous! Folks were so afraid that they tried to pass laws against them, in fact the "Dodgers" got their name due to the fans "dodging" the trolley's around the stadium. The mechanical transportation devices were feared all over the country.
Does anyone remember when we were told that computers were a flash in the pan and that they would never catch on? How about the cell phone scares that everyone would get brain cancer or that using them at gas stations would blow you up? Everything new is scary and society nearly always balks.
The fact of the matter is that this technology is coming and it will be a great improvement for travel safety. Sure, there will be a transition and there will be struggles along the way, but it will come whether we want it to or not.
When it does and when it is functioning nearly perfect (perfection is not possible on this earth,) then the roads will be safer, we will have more time in our day to accomplish other tasks (or for leisure) and we will be able to live further from crowded cities. I'm sure there will be many more benefits that can't be envisioned in our current thinking.