To me, concept art, especially for movies, is some of the best and most interesting work I've ever seen, although it's not always the kind of subject that you would naturally think to hang up in your living room. So that's what dens and family rooms are for! I also think that matte paintings for movies are beautiful as well, going way back to the old masters from the early days of film. But concerning the post title, I've found some interesting artwork that was posted on the Lostpedia website, for the Lost video game coming out soon. There are 19 images of conceptual art there so far.