I'm noticing this play out on the ground in Seattle. There's a big box Target opening up right downtown. It used to be that if you wanted anything from Target, WalMart, BestBuy, etc., you had to go on an adventure to the suburbs. I've noticed other retailers are making moves to smaller stores located in city centers (like BestBuy recently announced http://abcnews.go.com/blogs/business/2012/04/best-buy-releas...).

Also, Amazon is surprisingly still located downtown(ish). Most companies its size prefer to locate somewhere suburban on a sprawling corporate campus. It could be a competitive advantage; I know a number of young people who would stay away from Microsoft because of the dreaded commute to Redmond.