Microsoft doesn’t want to jump the gun with Windows 10 so rollout of the new operating system will come out slowly. According to Microsoft’s Joe Belfiore, the rollout will happen starting in the northern summer (around August) and will increase throughout fall. And the OS will be coming to PCs first, other devices like Phone, Xbox One, Arudino, and HoloLens will be launched in the coming months. Unfortunately, not even the PC version will be getting all features. Some unidentified features will be coming after the launch.
Source: Gizmodo