as for your "Utopian" comment, in the last few decades we have entered the era of plenty, the main problem encountered by startups we see here in HN is not that they are not innovative its that their products/services get drowned out in a sea of plenty
Given a few hundred years and plentiful+cheap energy it is not beyond the realm of imagination to imagine replicators, hell on a recent cruise i nicknamed then soda vending machines "the replicator" because the thing could spit out hundreds of different drinks with a few taps.
So a world of the future would be fairly "socialist" as machines and cheap energy allow people to devote their times towards science, exploration, art etc, we are already seeing this happening today and further mechanization and robotics will only speed up the trend