Population growth by generation is a bread and butter unsung metric in economics. It literally dictates the mass economic impact to be expected over coming decades. Anyone looking at the monetary comparison of Boomers versus Gen X versus Millenials and following can see the impact of numbers here over time. The regional disconnect possible going forward could produce a number of different results from economic boom in the South to disparate income levels regionally, depending how the numbers play out in housing, education, job availability and migration over time. Should be an interesting next 20 years.