The popularity of cloud concepts and the expected benefits from cloud computing have certainly raised expectations. Forrester now predicts that cloud spending will grow from $40 billion to $241 billion in the global IT market over the next 10 years, and yet, there's still a lot of confusion about the true payoffs and risks associated with cloud adoption. IDC has it's own numbers. Some enterprises expect to use cloud and hybrid clouds to save on costs, improve productivity, refine their utilization rates, cut energy use and eliminate gross IT inefficiencies.