How did you reach that conclusion?

If driverless cars are a "thing" in the future then what is Uber's USP? Why would you use Uber rather than one of a dozen other companies? Is it just their capital advantage? Their network of now unemployed drivers? Just the name and nothing else?

What is it exactly that keeps Uber in business with driverless cars?

The switching cost between apps is practically zero so if someone else manages to figure out a better routing / experience with picking up people (some people use UberPool for dating, really creepy shit!) etc then Uber will become a footnote in history quick. It's now hard to disrupt Uber in its own market but when it's a new market?

Uber raised their funding on the basis of their current business, not autonomous vehicles not any other delivery/logistics plays.