I have thought about this for years so thank you, I appreciate that you're impressed.
Once our values have been thoroughly sifted through we will get rid of a lot of things that are harmful to society. The absence of money will get rid of the things that stand between us like racism, sexism, and classism because those things cannot take root in a system that is absent of a hierarchy between race, sex, and class. For example, with racism, people of color miss out on many jobs, resources, and, opportunities and getting rid of a monetary system displaces the control of those things and this can be applied to all of the bigotry alive today. An individual may have opinions that a certain group of individuals are less valued than them but that will bring no harm to the individuals job, resources, and opportunities.
After a gestation period, the human condition will improve and the relationships that are dictated by status within a hierarchy will flourish thus allowing the human race to see the true value in another person. Our moral perspective as a species has changed over time and when we look back at history we see how wrong we were about a lot of things. The same will be true for us when, from the future, we look back to where we are now. We will have to(naturally) change our moral perspective to fit that paradigm. there will be some people who wish to do nothing and not contribute to what projects we are up to but luckily without the advent of money they can just sit down and stay out of our way and it will harm nothing. Once the workforce is automated, the system will sustain itself largely without the interference of human beings.
85 percent of the population won't need to ever work a job in their lives if they don't want to. There will be more than 15 percent of people interested in the projects that we still have to accomplish and my guess is that there will always be a problem for humans to solve and solving that problem will be good enough for some. Right now at this very second I would do anything to further an Adequate AI system and robotics which would take a lot of work to bring about. I know that if I am successful in doing that, the human race may partake in this resource based economy which will provide them true liberty. That's really all the payment I need and I'm sure there are millions that share that same sentiment today so in a less oppressive world I would wager there will be billions who natural live within these ideals.
To answer your question on Graphene being used in water desalination, I think that is a great idea especially in a future where we use green energy. If we fully harness green energy at our current capabilities to do so today in 2017, we would have a surplus of energy which is the main setback of water desalination. Using graphene in computer hardware itself would give us a lot of different efficiencies. The structural makeup of the graphene does seem to be small enough to seperate water from salt and last I heard they were testing it in comparison to other methods of desalination. I'm not a professional on the subject but I think they should take some type of magnetic material to mix into graphene during the manufacturing stage and then manipulate a magnetic field to arrange the graphene particles and magnetic material mix to create the proper holes in the graphene to filter the salt material out. Either that or use the resonance of sound to arrange graphene particles. Making the sheets and then poking holes in it the size of a molecule is just too tedious and inefficient.
Graphene is definitely one of the tools that will be used in our near and far future for a multitude of things but, I'd say that water desalination is a definite priority.