Cats and TVs... Have You Noticed?

We notice this as well when my wife and I do marathons on TV series. The cats are with us by the sofa and they seem to enjoy 24, Dexter, Game of Thrones, or any series for that matter. Strangely enough, they are not as attentive when we put on a movie. It's the same setting, some chips and soda by our side and maybe some alcoholic beverages occasionally. I'm theorizing that maybe they take on our attention level when watching. Movies are like casual entertainment, while TV series are something that require your attention lest you lose track of the story.