Cities are as entangled in global competition as companies, and what a TV Ad is for the car manufacturer, a skyscraper is for a metropolis. You can rank them according to the height of their buildings (or is it the extent of their identity crisis?) on www.skyscraperpage.com. Beautiful.
Also worth a look, but updating their databases right now, is www.skyscrapercity.info. They are always on top featuring pictures of recent developments in their unfortunately often very shallow forum discussions.