Gamasutra: "Earlier this year, though, Sony actually tried something different -- promoting the upcoming Resistance 3 in Battle: Los Angeles via a background billboard in the disaster flick. And it's continuing that cross-pollination by including a demo for the game into the film's upcoming Blu-ray release.
It's not the first time something like this has happened -- Sony tried it two years ago, pairing a demo for God of War III on the home release of District 9 -- but it's still a rare occurrence.
Sony is smartly using home video releases of films that cater to people in the gamer demographic sweet spot to promote upcoming titles. But by doing that so rarely, Sony is shooting itself in the foot."