One of the standard methods of science-fiction world-building is to take a current trend and extrapolate it into the future, and see what comes out. One trend I've observed is that over the last century or so, people have kept coming up with clever new ways to find answers to important questions - that is, developing new methods of rationality.
So, given what we do currently know about the overall shape of such methods, from Godel's Incompleteness Theory to Kolmogorov Complexity to the various ways to get around Prisoner's Dilemmas... Then, at least in a general science-fictional world-building sense, what might we be able to guess or say about what rationalists will be like in, oh, 50-100 years?
There are lots of open social science-ish problems (e.g., optimal employee management, clinical psychology, effective political organizing, child raising). I expect that 50-100 years from now experts will have a much better grasp of the best responses to these problems, roughly in parallel to how experts have a better grasp of heart surgery than they did 50 years ago. Likewise, I expect public understanding of the solutions will be at the level of today's public understanding of heart surgery - the average reader of the New York Times knows the basics of what it is, why you'd do it, and has a very basic idea of problems that could arise (i.e. knows organ rejection is possible).
I'm not sure, attempts to solve social science-ish problems tend to get derailed by status signalling in ways that heart surgery does not.