- there is no standard service such as Windows Taskbar to manage windows located on secondary displays
- you can’t quickly minimize, restore, or activate any particular window via its Taskbar button without having to move your cursor to the primary display
- there is no access to such essential controls as Start Menu, system tray, Quick Launch toolbar from secondary displays – requires moving the mouse pointer to the primary display each time you need to access any of these controls
- when you switch windows using Alt-Tab the Task Switcher service window is displayed on the primary display only, which is quite distracting if your current attention is on a secondary display
- there is no quick way to move a window to a certain monitor or to maximize a window over the entire composite desktop if such need arises

Unfortunately, even the upcoming Windows 7 doesn’t address those issues properly, so most of power multi-monitor users usually utilize the 3rd party products, such as UltraMon, MultiMon or DisplayFusion.

Recently, there appears the new solution – Actual Multiple Monitors (http://www.actualtools.com/multiplemonitors/), which fixes the mentioned UI issues and provides some additional services such as window thumbnails on WinXP, Windows 7 Aero Snap emulation on WinXP/WinVista, classic windows snapping to desktop boundaries and to each other, easy windows dragging/sizing by any point, and others.