MGS4 E for All 07 Interview, Payton says Blu-ray needed for MGS4!!

[Griffin]

Gamers want FMV with 1080p 7.1 uncompressed sound. Games like this and FF13 use this and thats why they can't be made on smaller disc's.

Last gen games had to be made on dual layer DVD's thats why the GC also never received all the games.