Windows 10 Anniversary Edition has apparently gone through enough testing via consumers and enterprise pilot programs to reach the CBB (Current Branch for Business) release stage. For more information on the servicing options and how they work (Insider Program, Current Branch, Current Branch for Business, Long-Term Servicing Branch), check out this link.
Windows 10 is also simplifying IT and significantly reducing deployment times. For example, with Windows Upgrade Analytics, customers can better assess their readiness for Windows 10 deployment and reduce an upgrade process that used to take years to just months or weeks. Windows 10 is also our most compatible release ever and with 99% of the top 3,000 apps shown to be compatible, customers are deploying at scale with confidence.