Barbaric!
I don't think a lot of modern superhero movies are going to have much of a shelf life either, but the nature of a movie lends itself to being more easily accessible by folks in the future, which contributes to their importance to the masses. Even if you could download a 10 or 20 year old game and play it easily, you would have to fall back into an antiquated playing system that gamers by and large don't care to do. Like those Youtube videos where teenagers today play and mock old video games.
There's also an issue where playing a videogame all the way through requires a lot of time and energy. Most who play games don't finish them, and you don't get the full experience, which for good and bad affects perceptions. Movies are relatively short, and don't take a lot of energy to get into for the most part.