Why do video games make such bad movies?

Do you think the idea of Jake Gyllenhaal playing a time-traveling Arabian swordsman seems far-fetched? Then consider Raul Julia as a gravity-defying, Third World despot, or Sir Ben Kingsley taking on the role of a bloodsucking vampire king. Sadly, as illustrated by "Prince of Persia," the latest film adapted from a popular video game, the more things change, the more they play the same. Decades after the debut of "The Wizard," a thinly disguised, feature-length Nintendo commercial, the marriage between Hollywood and gaming remains rocky a...