im pretty sure one blue ray disc is more expensive than even 4 dvds.
A more appropriate thread title would be sony is desperately praying that microsoft waits as long as possible to release the nextbox, because they know they can't let what will likely be another "hd twin" get a jump on their console again. Especially considering how much weaker the playstation brand is now than last gen, and how much stronger the xbox brand is now than last gen. And they sure as hell don't want to launch a console that will initially lose them a lot of money any time soon.
Also I think microsoft will pretty much ignore Japan next gen. Microsoft secured exclusive rights to a ridiculous amount of jrpgs in 2007-2008 and it didn't help them much. Money would be better spent trying to better appeal to continential Europe and the emerging markets. Especially considering how the 360 is no longer even sold in big retailers in japan. I think that further hurt the brand's image, and its successor will be considered a niche product that could get discontinued at any time.
