This might not just be a disaster for Google - it could be a disaster for software everywhere. If APIs become copyrightable, what happens to any open source software the implements a proprietary API? Supreme court judges just do not have the conceptual framework to properly adjudicate this. I don't think it's going to be possible to teach them the difference between interface and implementation within the parameters…
This case has been a ticking time bomb, where the law is to decide whether ideas are patentable. Extremely scary news, seeing it go badly.