According to IDC FutureScape: Worldwide Cloud 2016 Predictions, at least half of IT spending will be cloud-based by 2018 and grow to as much as 70 percent of all IT infrastructure spending (all software, services, and technology) by 2020. That growth is being largely driven by infrastructure as a service (IaaS), which has transformed the way IT departments around the world function and has changed the way business is done.