Folks who are working on Windows Vista Ultimate might have already seen this amazing feature.

DreamScene is one of the cool Ultimate Extras which enables you to put a video as your desktop background. Amazing thing is that it's not going to eat up your memory and processing power. Basically it requires only a small power from your GPU to decode the video. Among the requirements, your computer should be capable of handling Aero interface and the Translucent Selection feature must be enabled. In my machine when I put a video into the background memory usage goes up by about 3% and processor usage goes up by about 10% - 15%. But this doesn't work when the machine is connected to a projector. Not sure whether it is due to a resolution matter.

Anyways, DreamScene is awesome!!!