Their map doesn't make any sense to me. They show no expected migration to really any of the cities in the midwest but somehow they expect a mass migration of people from Miami to rural western Kentucky?
The whole concept doesn't make sense; 80 years in the future we won't even know if the US exists as a singular entity anymore let alone where its centers of population will end up. Imagine if 1920 Russia tried to predict where its population would end up in 2000; nothing would match up.
Why rural Kentucky and not Northern Florida or Georgia?
Are the shades of red based on migration relative to that same region's previous numbers, or some national average?