Here's my ill-informed take on the dilemma (I no longer live in SF):

* More high-rises means that SF loses it's charm

* The technorati are cash rich so they'll keep on coming anyway

* Soaring rents are forcing out those who make SF the desirable, culturally rich place that it is

* Eventually this corrects itself and Oakland becomes the desirable, culturally rich place (already happening)

* Rinse and repeat