Android Live Wallpapers for Windows 7?
Is it possible to have Android live wallpapers on Windows 7?
What you are looking for is called 'Dreamscene'. It used to be a part of windows but was later turned off. There are several websites that offer little applications for free to turn it back on. Then you can set any video that Windows Media Player can use as the wallpaper.
I am not linking to any of these sites as I would not be surprised that some have crapware/malware what not.
Wikipedia entry
A good software that is along the lines of what you are looking for (but not from Android) is Desktop Earth. It's dynamic, and pretty cool! Have used myself, seems to be clean...
http://codefromthe70s.org/desktopearth_dl.aspx