Look at Seattle, look at SF/Silicon Valley, same thing would have happened in NYC. And it probably still will, because Amazon will continue hiring there, they can't afford to pass up the talent. But at least the local taxes won't be subsidizing it.
You realize that Silicon Valley's high housing prices are basically self-inflicted, right?
Funny you mention Seattle though. When confronted with huge rent increases they embarked on a massive homebuilding program. Now rents are falling.
https://seattle.curbed.com/2018/9/21/17889042/rental-cost-decrease-seattle-area