No surprise about Wisconsin
The Western District of Wisconsin has for years been a "magnet" jurisdiction, just like the Eastern District of Texas, because of the traditionally plaintiff-friendly juries in that district. Unfortunately for Nokia, recent Federal appeals court decisions make it easier for the defendant to transfer the case to a court more favourable to them (perhaps effectively signalling an end to "magnet" jurisdictions). If Apple can show "good cause" (e.g. key witnesses are in a different geographical area), and that its proposed forum is "clearly more convenient," then the case will likely be transferred (to the less-plaintiff-friendly Northern District of California, for instance).