Microsoft is currently hard at work on the next iteration of Windows, currently codenamed Threshold, the operating system is set to put the desktop back in the spotlight for desktop users, whilst making the Modern UI even better for tablet users. So far, we've heard about improvements to the desktop side of things, including the new Start Menu, windowed Modern UI apps and a brand new taskbar which is set to include live icons and Cortana. The desktop is set to include a feature very similar to Virtual Desktops, users of Ubuntu and other Linux variants are already accustomed to a feature like this, and Microsoft seems to be interested in bringing said feature to Windows too. Virtual Desktops allow for more than one desktop at a time. You can have 3 windows on one desktop, and 4 windows on another. In Threshold, this feature would be activated via a button on the taskbar, clicking it will reveal all your desktops, which will allow you to click in on your selected desktop environment. Via Source