Posted 30 January 2011 - 01:49 PM
Very little IMO. Having Dual screens allows you to use either screen to display information by dragging things back and forth but the actual desktop (i.e. where programs open and icons are displayed) remains only on the primary monitor.
When you extend your desktop on to the secondary monitor then you can use that space as additional area to perform the desktop functions that would have been locked to the primary monitor.
Get your facts first, then you can distort them as you please.