Blu-ray, also referred to as Bluray Disc (BD), is the name of a next-generation optical disc format. It has the same physical dimensions as standard DVDs and CDs, however offers over five times the storage capacity of conventional DVDs, holding up to 27 GB of data on a single-layer disc (that's more than 2 hours of high definition video or about thirteen hours of standard video) and up to 50 GB on a dual-layer disc. Latest developments by Pioneer have pushed the storage capacity to 500GB on a si...