This isn't really a super tech savvy forum for electronics. Unfortunately, you aren't likely to get any useful responses for your question.

As for 'what' you can do with them, I imagine if you hook them up to the proper imager, you can dream up different things to do. Most LCD panels are black/clear, not color with projectors, so you can't get a color image, but they have been used for photo-sensitive material printing and similar.

In the world of projectors, most of these a pretty useless unless it is a part for part replacement model.