Connect this to the comment a smart Yale law school student told me this week: My class is not thinking of going anywhere other than New York, LA, San Francisco or Washington. And they are completely nomadic. They don't imagine themselves staying in one place for long.
A generation of nomads ... Now what does that mean for cities?
The first thing that comes to my mind is Richard Florida's Spiky World View. On a second consideration, I don't know of many political geographies oriented towards the churn of human capital. I'm ready for a generation of nomads. How about your city?