On the other hand, oil boom towns don't _move_. Anecdotally, a lot of people I know are leaving SF. I imagine the next 20-30 years will look like any other ind

On the other hand, oil boom towns don't _move_. Anecdotally, a lot of people I know are leaving SF. I imagine the next 20-30 years will look like any other industry, where a clear center emerged, but then it diffused outward into the broader economy as more and more industries assimilated the new tech. Now, you could make the argument that SF's core competence isn't so much a technology as the process of innovation itself, but I'm not sure that's the argument you're making. And I don't see any reason why a cheaper place with a lot of smart people and money (to reference pg) couldn't be the next SV, like say, Pittsburgh, or Seattle. Though I guess the social network, which is really what holds this entire place together, does have some staying power...maybe finance is the best example to prove your point?