Gartner predicts a 21.4% growth of the public cloud market, leading to a total $186.4 billion by the end of the year. While the largest investment is in software as a service (SaaS) at the moment, the analysis predicts a much higher revenue for Infrastructure as a Service (IaaS) in the next three years. The high concentration on the IaaS market is expected to grow, with the top 10 players accounting for 70% of the market by 2021.
Cloud computing could be described as the shift from storing data on hard disks on our computers to servers in the clouds (i.e., huge server farms). Cloud computing offers ubiquitous access to all our data and services from any device anywhere around the world (where there is Internet connection).