Yip, the 200GB capacity ones are 8 layer Blu-ray discs.
The thing I see Blu-ray as offering is room for beyond the game stuff... maybe even game/feature film incorporated stuff, as others have said. Lots of special features or unlockable-later stuff could be packed on the disc without degrading the game's quality at all.
Or maybe, just maybe, there could be games set aside in game makers minds that could finally be made and put out purely because of the storage capacity afforded to them by Blu-ray. (I remember back in the day Yu Suzuki could've done with higher capacity media to fully realise his epic Shenmue story. He really wanted all episodes to fit seamlessly on 1 disc).
