I'm not a macroeconomics person.
Macroeconomics, even with all of our computers and with all of our information. is not an exact science and is incapable of being an exact science.
In the area of macroeconomic policies, I think we'll see more centralization, like in the budgetary sphere.
Microeconomics is about money you don't have, and macroeconomics is about money the government is out of.
Friedrich Hayek is not an important figure in the history of macroeconomics.