[timdierks]

Have you ever been to NYC? Do you have any idea how much extra vehicle capacity would be necessary for Uber to supplant the subways? A subway track has capacity of roughly 25000 people/hour (112 people per car, 10 cars per train, 20 trains per hour) in each direction; that's as much as 10 freeway lanes. Manhattan has 20 subway tracks across its width (5 lines, each with express and local, in 2 directions), so that's at least 200 extra lanes of cars for Uber's disruption to innovate out of nowhere.

[slimslam]

Just got back from a trip last month, amazing city and I had an absolute blast. Took subway and Uber while I was there (no medallion cabs this time, but plenty in past trips). No doubt that the world-class subway system imposes substantial competitive pressure on cars in general.

I'd arguing that Uber has the potential to pose a disruptive threat to taxis, not subways. And to lots of transportation systems in plenty of other cities around the world.