Given they are getting banned in entire markets, I think this evaluation is crazy.
UPS, Fedex, etc already have software just as advanced for planning their routes. Uber isn't going to magically beat them somehow. Heck, part of why they lean on the USPS is there is some economics in delivery outside of big cities that create a situation where it makes no sense for more than 1 delivery company to deliver for the entire area (and even then the USPS loses money on rural deliveries in some areas!).
EDIT: To be clear, I'm not saying this proves a bubble...I'm just saying Uber is overvalued given the fact they are going to get hit with regulations eventually that will squeeze their margins or be forced to retreat from numerous markets.