Are Phoenix and Miami really going to become more walkable?

Two cities long associated with "You must have a car!" may be drastically shifting.

I'm obsessed with walkability as a concept. I think I'm a millennial, and walkability is seemingly what my crew wants out of cities. Walkable urban cores might be the biggest real estate development since WW2. Hell, millennials moving to cities and having kids might make soccer popular in the United States. (Cats and dogs, living together.)

Well, my wife…