Ahhh, you read the plan.
GM (aka Government Motors) wants to decide where you go and when, and you are fine with that?
Suppose your car arrives, and you instruct it to take you to the gun range, a political event, or a religious service. The car decides you shouldn’t go there, drives away, and reports you to the mother ship. What do you do then?
Besides, it is simply not economically feasible to have enough on-demand vehicles available to satisfy your needs, and the needs of everyone else in the area at the same time.
How long would you willing to wait for your ride?
“How long would you willing to wait for your ride?”
How long do you wait now? Not long.
I’m pretty sure they will have the logistics worked out if you need a car to pick you up at 7:30 it will be there at 7:30. The free market system will prevail