The tech sector does absolutely nothing for the unemployed or to allay the wider social problems in Berlin. The last big wave to hit Berlin was the move of parliament from Bonn, with countless media companies settling in Berlin in its wake. However, these companies also attract people from outside, these are the now (in)famous "Schwaben" coming in. Berlin is hip, and young, educated people come from all over the place (and world) to be part of it. That, however, does very little for Hellersdorf, the Märkisches Viertel, Siemensstadt etc. etc. What all of this brings is a further social divide in the city and further gentrification á la Prenzlauer Berg and Mitte.

So far, I fail to see how technology companies are going to be any different.