The world’s economic center of gravity shifts – a post in McKinsey Quarterly’s Chart Focus newsletter about
… 440 largely obscure urban areas that will account for close to 50 percent of expected global GDP growth between 2010 and 2025
McKinsey Quarterly has a lot of good information on cities, but you have to register first for free. Check out Unlocking the potential of emerging-market cities (both images here are from this Sept 2012 article) and Global cities of the future: an interactive map, a very nicely done interactive with projections out to 2025. Or the full report from their Global Institute, Urban world: Cities and the rise of the consuming class which you can download in PDF or for Kindle or ebook.