People already use Amazon for deliveries before autonomous driving. That substitution already happened, and switching to autonomous vehicles for last mile deliver isn’t going to change the consumer’s driving habits.
Again, either you use Uber eats or, like me, you don’t. I don’t see how the mechanism of deliver changes that decision, for the customer?
Delivery doesn't have to change qualitative features to shift tripmaking demand, it just has to become relatively cheaper and faster, which AV does promise. "The cheaper it is, the more we use it" is a basic outcome of supply and demand.
If a restaurant can run delivery bots at a low enough operating cost, they can offer free neighborhood delivery. Who would make a trip to pick up an order, given that?
Again, either you use Uber eats or, like me, you don’t. I don’t see how the mechanism of deliver changes that decision, for the customer?