What is more probable I THINK (not sure) is that Prop 8 will have possibly no standing in SCOTUS referring it back to the CA fed court which ruled it was unconstitutional so gay marriage which now is ahead in public opinion there now anyway WILL be legal in CA. As for DOMA, the Court I suspect will rule it a states rights issue and that is where it is legal those married WILL be able to get Fed. benefits. They will say it is not legal for the Fed. government to discriminate IF and only IF those states that say okay to gay marriage then the Feds cannot discriminate.
When will the southern reactionary states EVER recognize it? Many if not most won't so at another time in another day when the generation that is old eventually dies and their children assume power little by little more states will get it. I say MORE. Some may NEVER get it so gays will have to move to states that have it and that is OKAY by me since many gays are very successful and wealthy. Bring that money right on to Mass I say. BTW, why I LOVE this wonderful state. We were the first to recognize gay marriage thanks in large part to the Mass Sup. Ct. headed by Margaret Marshall. I LOVE MY STATE the bluest of blue the most progressive in the country ... well usually!
This is just an brief quick overview as I read the tea leaves. I as usual reserve the right to change my opinion!