The problem with games is that they, by their very nature, have problems for the storyteller:

First, they take away his control from (at least) one of the characters, since it has to be given to the player. This means that either certain stories can't be told as they should, since you can't force the player to have the same motivations as the character, especially if they're supposed to be revealed only later.

Second, plenty of great movies would make shitty games. Dialog driven movies (12 Angry Men), for example. You'd need to put the player on rails and limit his movements to a minimum - and to do that, why make a game at all?

Third, game play can distract from the story. There's a reason why people tend to make more mistakes when they're recalling a situation where they were participants instead of passive viewers.

Give me a medium that adjusts the interactivity demands of the entertainment according to the recline of my chair or the open width of my eyelids. Metaphorically speaking (or not).