Another major improvement that is coming is the multi-monitor taskbar that many users have complained about the lack of in Windows 7. In Windows 8, users will have the option to show the taskbar on secondary monitors, and then there will be options to choose how the application icons are shown on these taskbars. By default the app buttons will be shown on both taskbars, but you can set it to show app buttons only on the taskbar belonging to the monitor where the application is open.
