GDP per Person: Forecasts..

PwC, a consulting firm, reckons that when countries are ranked by their predicted economic heft adjusted for purchasing-power parity (PPP) in 2050, five of the top seven spots will go to today’s emerging economies.
In PPP terms, the economies of both China and India will be bigger than America’s. But because the populations of China and India are so large, people in both will remain considerably poorer than those in today’s developed countries.
In 2050 GDP per head in America will still be more than twice that in China. But PwC reckons that some emerging economies will catch up even in per capita terms. Russia’s income per person will go from being three-fifths of Italy’s today to level with it in 2050.

http://www.economist.com/node/17905949?story_id=17905949&fsrc=scn/tw/te/rss/pe