Taxis may be less popular, but are far from dead. Much easier to stick your hand out in Manhattan than fiddle with a smartphone crapplet and wait for a car to graciously show up. Same with competing car services.

Other problem with Goober is lack of anonymity. You can't pay with cash or a pre-paid card, meaning that your trip data are tied to your identity for life. Travis Nogoodnick's view of privacy frankly stinks.