So, for those like me who don't quite understand all the legalese: I've been operating under the belief that APIs and protocol "structures" were ruled as "non-copyright-able" before, while "implementations" absolutely were copyright-able. Was I wrong then, or am I wrong now?
So far, the ruling only applies in the Federal Circuit. And you only get into the Federal Circuit when there is a patent aspect to the case. But a forum-shopping litigant could have a patent claim to the case, drop it part way through, and still wind up in the Federal Circuit on appeal (which, if I understand correctly, is exactly what happened in this case).