Enterprise spending on cloud computing growing at a faster rate than overall IT spending will pose a challenge to legacy hardware and software vendors, Gartner cloud forecaster Ed Anderson says.

Cloud computing is expected to grow 19% in 2012, becoming a $109 billion industry compared to a $91 billion market last year. By 2016, it’s expected to be a $207 billion industry, according to Anderson’s latest findings. That compares to the 3% growth expected in the overall global IT market. While it’s true that the $109 billion cloud market represents just a 3% chunk of the overall $3.6 trillion spent on IT globally, Anderson says it’s still responsible, in part, for a slowdown in growth for traditional on-premise hardware and software sales.

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