Are PCs used to project movies?

I went to the movie theater recently and before the commercials and trailers had started, you could see the Windows start bar projected just below the normal screen area. So a PC is being used for something. What?

A theatrical version of UT2K3?

Some theaters have switched to digital projection, and it wouldn’t surprise me if they used relatively normal PCs to accomplish this.

Those annoying advertising/crap-trivia slide-show deals that run while the theatre is filling up are often PC-driven.