Someday videogame movies will have their Ghost World, their American Splendor--a breakout film that will bring a marginalized medium a degree of mainstream recognition. Maybe Jake Gyllenhaal will even star in that movie. But in the meantime, courtesy of Disney and the guy who directed Mona Lisa Smile, videogames make another predictably awkward transition to the big screen in Prince of Persia: The Sands of Time--a movie whose primary selling points are Gyllenhaal's admittedly compelling abs. by Alison Hallett