The consensus from previous discussions about this is that the rot was too extensive for Gorbachev's reforms to have worked, to save the USSR you need a much earlier PoD that results in the Soviets being able to restructure their economy. If they manage it then you will have a continuation of much of the politics of the Cold War era, the threat of nuclear war will remain but depending on events it may be on a lesser scale. You would still have proxy wars, the Gulf War may still have happened but I doubt the Iraq War would have. It would be interesting how the Soviets would react to Islamist terrorism, they would have a series of potential flashpoints in Chechnya and Central Asia so if there is a "war on terror" of some kind the Soviets maybe involved in some way.