In an interview from Famitsu via Kotaku, Hideo Kojima revealed that Blu-ray is too small for Metal Gear Solid 4.

Kojima: For us, we’re not still not satisfied with the quality we can do. You know, there’s not capacity space.

Interviewer: Wait, wait a sec. Saying there’s not enough capacity, are you talking about Blu-ray?

Kojima: That’s correct. There’s not enough space at all. (laughs) …There’s not enough space. We always talked about where to cut and what to compress.

If he’s feeling constrained by a 50GB Blu-ray disc, a standard DVD would be downright frightening. I don’t like the odds of this game hitting the Xbox 360.