And here's why it will never work
Maybe they can get these microchip cars able to drive with people, but what happens when one of them hits my car because I did something the programming didn't expect? Too much liability, lawyers and politicians (who are also just lawyers) will kill this idea in America.
And widespread adoption will never occur due to cost. I can get a fairly reliable vehicle on the road for 3-5 thousand dollars. How much will a PC car cost? I'm just too cheap to blow that much money on transportation.
Put our efforts into something useful, this will not work any time soon.