[netcan]

This is interesting. It's potentially a bridge into "mass" transit.

Sam Altman's insight about his own (high end) car use and the potential cost of replacing it completely with Uber is one legitimate example of how they could expand beyond of the taxi market. I don't think it's impossible for uber to have a few hundred or thousand core users in major cities that spend $10,000 per year on Uber. That only really applies to a small group of wealthy individuals.

But, the real big markets are usually nearer the bottom of the pyramid.