What if the Iron Curtain still existed?! Are you mad?! For one, you would not have had to worry about at least the jelly doughnuts crying about the war as they would be shot any time they tried to speak at all unless it was sanctioned by the Soviet government. Millions would still be opressed by the Soviet regieme.
Remember, GDP is not everything. I would trade GDP for freedom anyday.
Barring that however I believe a two superpower system is important to maintain balance in the world (duh).