Windows has had multiple desktops since before XP. You just had to download a PowerToy to do it, here's the latest version (XP+, sorry):
<a href="http://technet.microsoft.com/en-us/sysinternals/cc817881.aspx" rel="nofollow">http://technet.microsoft.com/en-us/sysinternals/cc817881.asp...</a><p>It is SO popular nobody knows or cares. There are also tons of third party "desktop managers" both open source and paid for Windows, again -- nobody cares.