So I tried to float this idea elswhere with little succes but maybe it will find fertile ground here.
One of the problems with a big fixed screen is what to do with it when the projector is turned off. OK, maybe this is not such a big problem in a dedicated theater but more and more the front projection theater is integrated into family and living rooms.
The idea is what to do to make the screen a piece of art when not in use. I'm not talking about covering it with something, I want people to think about active art. For example a slowly pulsing waving sheet of mutlicolored light that resembles the northern lights.
If you have an old projector with a burnt out bulb, could you rig up a common light bulb just bright enough to project something like the visualizations in Windows Media Player.
Give it some thought and I will go get some links to equipment that might be useful for this project.
Here is a really simple example of a device that might be useful:
Check It Out!