In Cuba, Russia and other communist countries there were always discussions of the "New Man", an admirable individual who was not interested in selfish gain but only in the welfare of the entire society and it was thought that these altruistic people were what was needed for communism to work. The only problem was there were none, nobody thought in this way and how ever hard they strived the commies never managed to change this fundamental aspect of human nature.
If the world became completely Ancap, charities could replace the welfare state, technology and machines could create an abundance of food and energy, travel and housing could become extremely inexpensive, possibly even free. At this point real anarcho-communism would emerge as status in society would not be found though material wealth but by the importance of the individual's contribution to society.
The "New Man" would come into existence! How many generations will it be?