I have recently upgraded several of my computers to Windows
One of the new features of the "Ultimate" editions is "Windows
DreamScene". It allows you to use animated desktops created from
movies. StarDock has released a free add on the DreanScene, "DeskScapes"
which adds additional functionality. There are also a few very
good free "Dreams" available for download on Wincustomize.com.
For more info, check it out at http://dream.wincustomize.com/