tldr: Guy comes to SF, figures it all out in a weekend, sees things that I've never seen living here like 'dozens of co-working facilities in 10 blocks'. Here's my take: The concentration of wealth here still pales to NYC area, Google, Apple, Facebook alone are giant money funnels from the whole world into this area, and there are more funnels being built every day. Not saying it will or should go up in a straight line, but personally I'd bet on the trend.