Who says you need Blu-ray for an epic RPG? Apparently Mistwalker has decided to cram as muchas possible into Lost Odyssey, meaning it's going to end up being 4 DVDs. That's almost equivalent to a dual-layer Blu-ray disc.
At least it's going to have lots of gorgeous CG and both Japanese and English vocal tracks. Still, I think it's pretty funny that games like Oblivion can fit onto a single DVD, but Mistwalker must really be fond of their high-res FMVs, because 40+ gigs is a hell of a lot for one game.