As seen in the video, the taskbar for this early build of Windows 9 includes an icon for creating and closing virtual desktops. New workspaces can be made and each workspace and their open programs can be accessed from that icon. The interface is certainly familier of what's its been available on OS X and even Linux for years.!!
this should have been standard on windows
Seems like everyone's been coping everyone now !!
Source : - Winfuture