Just thought I'd point to the part of the headline that says "Berlin". As in a single city. Where the news isn't so much about the Pirate Party gaining a foothold, so much as one of the "stronger" parties being kicked out in local (not federal) elections. It's a wake-up call to the other parties that their power resides with the people and they'd better listen to those people.
It won't change anything on a national level directly. Indirectly, it's great exposure of the PP and may lead to other things down the track, but that's all that can be said there.