There's still multiple court cases and violence stemming from attempts by the states to sidestep the very clear ruling. However, this is also the justice's being cowards, because no ruling, including SSM, will lead to the same kind of fallout that the right wing loses their minds over as abortion does.
As for as the confirmation process, yes, the senate is a hindrance, but few nominations have been blocked and the result of lifetime appointment is 10 years later, it may not work out as intended either way. Those 4 judges i cited were definitely not appointed to make SSM legal, yet they will. The two obama appointees were confirmed despite it was known they would vote for SSM. Why? Because the president has to appoint *someone* the other party won't like