Depending on how you obtain your licenses for Windows, this may or may not be an issue. It will
not be an issue for us on most of our public machines, but it
will be an issue on our staff computers:
"Microsoft's looming Windows 7 licensing 'disaster' for XP shops" --
http://www.infoworld.com/d/windows/microsofts-looming-windows-7-licensing-disaster-xp-users-639