I suspect what will happen is that both DOMA and Prop 8 will be held unconstitutional. That means future court challenges with the Roberts court will dismantle all 31 state laws that prohibit same sex marriages.
I hope, HOPE - that it will be left up to the individual states but I have my doubts.
That is for the secular law.
My "law of the land" will always be not to allow same sex marriage.
More information about formatting options