Some of the original work generating this all is via Rich Florida. Atlantic: Are these America's Brainiest Cities.
None of it should not be any surprise to readers here. The lack of belief in how we compared to the nation with regards to educational attainment is why I once wrote this: Pittsburgh's Young Workforce Among Top 5 Most Educated in U.S.; Almost Half Hold a Bachelor's Degree or Higher. When the focus was narrowed to graduate degrees, Pittsburgh tied for the top with Washington,DC in that past calculation of educational attainment in the local labor force.
Why it matters? If you want to see Pittsburgh's transformation in a slide, this may be it. We all use this slide a lot:
But the real importance is what it means to individuals. Hard to get past the difference in lifetime earning potential of a college degree, though I know many dispute the value given the cost. Here is just a recent snapshot of the earnings disparities by both educational attainment and gender.