Is there any hope that something tangible is going to come out of that? Given its history it seems more than unlikely that Germany has any abilities of severe actions. Oh well, I am sure they are going to send a detailed list of issues that need to be addressed through "diplomatic channels"...
German politics will just bend over making a happy face.
But it will do really severe harm to the image of the US in the German population. A lot of Germans have a love/hate relationship with the US, and this will not go down unnoticed.