Everyone seems to forget about the cost. This will significantly add to the initial cost of the vehicle. And, more so, the maintenance cost.
The tire pressure sensors are designed to last for 7 - 10 years. I buy used cars because of the initial cost. This last tire change I had to replace the TP sensors at a cost of $50 apiece. If you have anti-lock brakes and you have a bad wheel bearing, now you have to replace the entire hub ($60) instead of the wheel bearings ($20.)
Now you will have an entire sensor suite that you need to maintain in order to keep your self-driving car running. Your annual car inspection is going to also become more complex, more like an aircraft annual inspection. Are you ready to pay $1000 for your annual car inspection? And however much it is going to cost to repair any flaws that are found?