Windows 8.1 Update releasing on April 8
The Windows 8.1 Update now adds a Power and a Search button on the start screen, can boot directly to desktop mode for select devices, pin desktop and new interface apps to the taskbar, a context menu while right clicking on an app tile and a pinned Windows Store icon on the taskbar.
MSDN subscribers can now get the Windows 8.1 Update today while regular Windows 8 and Windows 8.1 users will get it from April 8 through Windows Store.