http://xkcd.com/734/
:-)
Looking around the site in your link, I was reminded of OS/2 1.x's "animated desktop". It could do things like show fish swimming around as your wallpaper. It's not clear to me if anything like that exists now, though there are some that use Flash for animated cells on wallpaper.
(The main problem with running "animated desktop" on OS/2 2.x and up, IIRC, was the mask around the fish was square, so it wasn't seamless with a bitmap background.) One would think that in 15+ years someone could have come up with a good animated aquarium desktop by now...
FWIW.
Cheers,
Scott.
(Who uses winXplanetBG with a cloud map to change his desktop every 3 hours.)