One of the many advantages Blu-Ray brings to the table is its ability to double or triple the layers within the disc; allowing for more storage. Currently, most PS3 games and movies fit onto a 25GB, single layer, Blu-Ray disc. However, some standout titles like Metal Gear Solid 4 have pushed the boundaries and needed a dual-layer 50GB Blu-Ray disc. All the disc players, including the PS3, can play these single and dual-layer discs.
However, a recent interview with Andy Parsons, senior vice president of corporate communications and new product planning for Pioneer had with Home Media Magazine revealed a stunning turn-of-events with the evolution of the Blu-Ray disc.
“Player manufacturers design players to meet published specifications that define maximum media capacity, which in the case of Blu-ray Disc, is 50GB on two-layer media.
“I think there will be applications for larger capacity recordable discs, but it would be difficult for [discs larger than 50GB] to achieve compatibility with the installed base of players,” he said.
Parsons went on to say that future Blu-Ray players would be able to play larger and larger discs.
“Much as how tape formats such as VHS gradually added higher recording capacities that were playback-incompatible with older decks.”
[Source]