IT as a Service - The half trillion dollar 'niche'

From Deloitte CIO Journal

 Deloitte Global predicts that by the end of 2018, spending on IT-as-a-Service will be just under $550 billion worldwide. For many enterprises, large and small, IT-as-a-Service is appealing for several reasons. It avoids significant capital expenditures and provides a predictable expense based on actual use which is easily scaled up or down, based on business needs.