The Defense of Marriage Act violates the "Full Faith and Credit" clause of the Constitution (meaning that marriages/contracts in one state apply to all others). A Federal judge recognized that fact by calling DOMA unconstitutional and setting it up for Supreme Court review.
This is basically setting up DOMA to become the LGBT communitties "Heller and McDonald" decisions.
I expect the Supreme Court to simply affirm his ruling by refusing to review the case. This will go away quietly instead of being a 5-4 nailbiter.