I agree with everything you wrote except the 'level-5-autonomous-car-ubiquity. I don't think Uber's success depends upon it; Uber is the next iteration in the domestic logistics industry (USPS>UPS>FedEx). One way for Uber to communicate this to the market would be to have all its functionality available in a single application (of course, some of their products are limited availability because they haven't figured out how to scale them). Amazon had/has similar financial metrics over many quarters. Amazon is also a potential acquirer.