I'm a writer. Since I was very young, I've written poetry, short fiction, long fiction, philosophy, analysis, and just about any type of writing you can think of. In fact, I'll be extremely disappointed with myself if I never publish a novel, a book of philosophy, and a collection of short stories.
So it's ironic, to say the very least, that story has never been my primary interest in a game. Games are about my choices... how I, as a player, decide to use and mold my character. I loved Deus Ex. But do I remember much of its story? No. Mainly, I remember the few times it let me decide what happened next. All I can remember of KOTOR is the robot who hates meatbags. In a game, any game, it's about my story.
So I'm surprised to find my mind made up about purchasing Star Wars: The Force Unleashed because of this video teasing about the game's narrative. I was, and remain, cautious about the game, because the thrill of playing with the physics technology could easily be short-lived (if LucasArts fails to include other dynamics or if they stage every encounter rigidly). But now there's no question that I'll be buying the game. I will. I'm buying it just to see what happens between Episodes III and IV in the Star Wars saga. I must know, and I don't want to simply read a summary or transcript online.
This begs the question: Are only Star Wars and LOTR capable of so powerfully compelling a gamer like me through story hints to buy a game? Could an IP not belonging to books or films entice me so strongly with story alone?
I don't know. But I can say this much: if such an IP is possible, it sure as hell ain't Halo or Tomb Raider. ;)