Thank you for your question. Other agents have shared some interesting answers and I can agree with some of them for sure.
I would have to agree that SOMA isn't, at this point, the most conducive to the family environment. I don't think that, from your question, this is exactly what you want to know though. If family is something you're concerned with there are plans for a new K-6 grade school just over Mission Creek off of 3rd Street in addition to 43 acres of green space planned for the Mission Bay area. Every day there is new development in SOMA and the surrounding areas and this part of the city is poised for tremendous growth.
Comparing the tech sector with the growth of our fine city isn't exactly fair. I'm from NYC originally and I saw the migration to the upper west/east sides and into Harlem which is one of the hottest areas now. Like NYC, San Francisco has one option for growth. That option is to head South into SOMA and Mission Bay, Potrero Hill, and the Dogpatch which are areas still being developed. In my opinion, you have an opportunity to get it early and see a great return on your investment.
I hope this is helpful.