That's probably a thought experiment in business models. Like a franchise. Waymo is experimenting with Uber as it's retailer, essentially. Personally, I'd prefer to do business with Waymo, directly.
If the cost of the Waymo Driver hardware falls to the point where it's not prohibitive for the low duty cycle of a private vehicle, I could see that eventually happening.
If the cost of the Waymo Driver hardware falls to the point where it's not prohibitive for the low duty cycle of a private vehicle, I could see that eventually happening.