We dont even need something that far advanced. We just need to realize; 1) people NEED resources to live. 2) people NEED resources to do/make things. 3) people NEED communication and transportation and trade of themselves and those resources. 4) people NEED a place to live. 5) people NEED a controlled environment in order to survive and live with out being preoccupied with trying to survive. 6) WE ALL NEED TO PROVIDE 1-5 TO EVERY PERSON ON EARTH FOR FREE OR AS CLOSE TO BREAKING EVEN AS WE CAN(free or as close to the GDP created covering the cost of doing so). Right now we HAVE the tech needed to: Create power for next to nothing from renewable energy sources (solar, wind, ocean currents, steam engines[ even nuke plants are just steam engine power systems ], methane, ethanol, methanol) Create transportation (rails, roads, flying, sailing aka any boat on the water) Create instant communication Provide water via ocean purification&distillation Provide food via agriculture and greenhouses Create shelter from virtually any material 70% of the planet surface is uninhabited by permanent structures for living and THATS JUST THE OCEANS (something like 20% of all land mass on earth is how much is covered by cities towns and agriculture) And we have air conditioning, the ability to filter out nearly all contaminants and the ability to build a structure to withstand most natural disasters. SO we ALREADY have EVERYTHING we need to do it. We just wont because; Its not profitable It requires every one to share everything resource wise No one can agree on how to run it let alone who will run it No one knows how to set up the proper service to resource trade to manage it all. An thats it.

Ah...That's really sad truth.