Not a complete victory :-(

Not a complete victory :-(

But it's not settled that APIs are copyrightable or not.

I'm not surprised. Judges generally try to rule on the narrowest basis available. They really prefer not to invent new legal principles if they can find a justification within existing law that lets them avoid the issue. So ruling that Google was making fair use avoids the question of whether APIs are copyrightable, though it does hint at it.