I, along with quite a few other folks, have complained about the lack of creativity found in the moviemaking and TV show production areas these days. Generally, those complains center on recycled plots, uninspired and unnecessary remakes, endless trips to the same well for jokes, situations, characters and whatnot.
But this guy put together several collections of movie posters to show how you can judge significant features of a movie -- sometimes most of its plot -- by the movie poster itself. Different kinds of movies will have their own similar kinds of posters - and if you see certain images or themes in a poster, you can tell a lot about the movie even if you haven't seen it or even heard of it.
You might notice it's not just Hollywood that's caught up in the visual cliché game -- several of the posters featured are from international films but they seem to follow the same patterns.