Hollywood's obsession with video games is a reality, and the reasons are simple. Most of tinsel town's young directors today belong to a generation that grew up on video games, and adapting them to scripts and movies, while not exactly a novel move, comes naturally. These filmmakers understand the language and the passion, and the present tech-savvy generation is definitely an audience.
The question, then, is how many such adaptations have really worked. In recent memory, Prince Of Persia: The Sands Of Time and Tron generated plenty of hype, but didn't set cash registers ringing....