Actually, Comrade_Stalin, I believe the Comrade is wrong, the SU did not "out-tech" the west, except for a brief period in the early fifties (the space-race). In particular, the SU lagged very far behind the US in electronics technology, for example.
I think that Communism if course would allow for society to progress leaps and bounds beyond our current technology- because research and development will be controlled by the priorities set out by the dictatorship of the proletariat. Capitalism in fact does not allow for technological progress to happen to quickly- the result of this happening causes booms and busts in the economy.