Gartner forecasts that emerging markets will generate $1.22 trillion in IT spending in 2012. This represents more than 31 percent of the projected worldwide IT spend of $3.7 trillion (see that report here).
The BRIMC countries (Brazil, Russia, India, Mexico and China) alone will account for 17% of the global total, representing nearly $658 billion.
via Gartner Says Emerging Markets Will Generate $1.22 Trillion in IT Spending in 2012.