I've been looking into this topic a bit more extensively as of late (still have no clue about some of it though haha). Anyways, I've always been under the impression that it was more of a cascade effect. Once some states legalized same-sex marriage, it'd only be a matter of time before the country fell in suit. I guess I was blind to the idea that this could be taken away from states even where it is legal. So not only could there be no progress forward, there's a possibility a couple steps could be taken backwards.
Nevertheless I think federal action is definitely news that is welcome. Albeit it might take awhile, stuff'll eventually have to happen. ;P