Jimbo references this article in The Atlantic in a post below – worthy of bringing to the foreground: After Uber, San Francisco Has Seen a 65-Percent Decline in Cab Use
The precipitous rise of services like Uber (and its fellow shared-ride services, like Lyft and Sidecar) has meant—markets being what they are—a precipitous decline in taxi rides taken across the city.
… the director of the San Francisco Municipal Transportation Agency gave a presentation to the organization’s board of directors. It was titled “Taxis and Accessible Services Division: Status of Taxi Industry,” though it may as well have been titled “How the Taxi Industry Is Doing Now That Uber Is a Thing.” …”Part of the story,” Toran noted, “is we don’t have hard data yet from the [transportation network companies’] side to really analyze the full impact on the streets and our air quality.”
And this is the early stages. Lots more disruption to come.