..and create whole areas like Capitol Hill which are mostly tech people moving in, pushing out others .. or what's going on in Freemont where homes that people bought for $120k now go for $800k (and you see low-to-middle income workers like cashiers, nurses, hair-stylists, cash out on their houses and move way out).

This is a good start, but I hope they don't stop building and complete all the existing projects. The prices are still high. ST3 will help make it easier to live where you want, with a lower income, and still be able to commute reasonably, by train, to work.