Let me ask you something: are you detail-oriented? I sure am. I don't know about you, but I definitely appreciate particular features that make something even better.
You can say the same about movies. Have you ever seen a flick and thought, if only they did this to make it better? Or the opposite, you saw a film and were amazed by a specific detail that made it even more special? This is precisely the case with these movies, and I'm sure you can agree with me once you see what I mean.