Nobody is going to use Uber to make trips to Home Depot, the grocery store, weekend getaway to the mountains, etc. That's what that one car per household is for.
There are other services such as Zip Car and Car2Go that work very well for running errands. I live downtown Denver and sold my car nearly a year ago, haven't looked back since. There are times I rely on friends to go to the mountains and such, but for the most part I'm just fine without a car.
Zipcar is fail because you pay as long as the car is away from its original "home" parking spot. Why can't I drive it to another Zipcar spot in front of the mall? For example instead of paying just for the 15 minutes it takes to drive there, I have to pay for the drive time plus the time it sits in the parking lot for 3 hours while I shop. Fifty dollars, no thanks.
