Narrative in games lecture

Last week we were required to attend a lecture on narratives in games and trans media.  The lecture focused on building an entire world around our story in order to create a game as opposed to a different style of media that is much easier.  For example, books are the simplest due to the fact that much of the world is filled in by the reader's imagination.  Movies add a second and third layer of visuals and audio combined to create what the director wants you to both see and hear.  Video games are a whole new medium, much like movies, due to the fact that they add a fourth layer to this which is interaction.  By allowing the player to interact with the world, we allow them to create a story that feels more personal and immersive than a movie.  Then, by combining all three, we can accurately create an entire universe through trans media.  This was the general idea of the lecture, but I felt as if I've heard it all before, mostly from our programming teachers throughout the last three and a half years at college.