I might have missed the Supreme Court ruling (which I doubt), but I wouldn't get too excited about this yet.
See, while this is a major victory, if The Supreme Court decides to back the goverment regulation of video games, it's desician overrides everything else, that's the whole point of it's existance. The policies of other organizations in the goverment, and other laws and precedents are irrelevent before it's will. If the ruling from them comes down that it's not protected, and the goverment can enforce content regulation by enforcing criminal penelties on people who sell to minors and such, games being considered artwork by other goverment agencies has no meaning.
Actually, this is a dangerous ruling, and if anything we should be a little worried. Right now the protection that art enjoys can be threatened if video games ARE determine to be subject to goverment regulation (no matter what that regulation is intended for, this opens a lot of doors as we all know), and are considered to be art, then it will also be creating a precedent where the goverment can likewise regulate OTHER things protected as art the same way that video games are, by creating and enforcing ratings and so on. By ruling first, we're seeing more added to the stakes, while this could influance the Supreme Court against wanting to make what will be a more sweeing ruling, it also means that if The Supreme Court does it's job as mandated and doesn't consider things like this (especially since they happened while they were in session), we could all be in a LOT of trouble, and ultimatly waiting for The Supreme Court to meet again and basically overturn it's own ruling, or at least make another ruling that clarifies things in such a way as to consider video games in their own little cosm.
Basically... don't celebrate yet, this is a touchy matter.