The real issue that no one mentions is that it will be dark at night and cameras will not work very well. You will be able to identify every person who gets in, but not who spilled something all over the seat / floor. So you can’t charge anyone for cleaning.

The next passengers will grind it into the fabric. When you get the car back it will be stained, and no insurance covers stains. If you think Uber will cover that with no proof of which customer did it, you are dreaming. This is one of the many things an Uber driver does (telling people “no smoking, drinking, eating, sitting on laps, etc.”) that a self driving car won’t do.

A self driving taxi will be like the back of the bus, where no one is watching. You don’t want to know what’s going on there.