One of my favourite things about the Linux desktop is that virtual desktops are a standard feature of just about every window manager. Mac OS X has Spaces and I have a vague memory of using some sort of virtual desktop in Windows years ago.
It isn’t a standard feature of the Windows experience but there are apps you can download to do that job. Desktops v1.02 is one that I tried, but there’s also VirtuaWin. Desktops is basic but works fine in Windows 7!
Have you tried any other ones?