Film critic superhero Roger Ebert criticizes Kellee Santiago's presentation at TED and confirms his earlier statement that, in his opinion, "
in principle, video games cannot be art".
Read his blog post:
Video games can never be art1243 comments and counting

One obvious difference between art and games is that you can win a game. It has rules, points, objectives, and an outcome. Santiago might cite a immersive game without points or rules, but I would say then it ceases to be a game and becomes a representation of a story, a novel, a play, dance, a film. Those are things you cannot win; you can only experience them.