<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Blu - ray or Blu - ray Disc (BD) is a digital optical disc data storage format . It was designed to supersede the DVD format, in that it is capable of storing hours of video in high - definition (720p and 1080p) and ultra high - definition resolution (2160p). The main application of Blu - ray is as a medium for video material such as feature films and physical distribution of video games for the PlayStation 3, PlayStation 4, and Xbox One . The name "Blu - ray" refers to the blue laser (specifically, a violet laser) used to read the disc, which allows information to be stored at a greater density than is possible with the longer - wavelength red laser used for DVDs . </P> <P> The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs . Conventional (pre-BD - XL) Blu - ray Disc discs contain 25 GB per layer, with dual layer discs (50 GB) being the industry standard for feature - length video discs . Triple - layer discs (100 GB) and quadruple layers (128 GB) are available for BD - XL re-writer drives . </P>

When does it come out on blue ray
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