Pioneer has announced plans for a one terabyte (1TB) Blu-ray disc that could be on the market by 2013.

With a 400GB disc already ready for launch and a half-terabyte disc expected to follow shortly, there may be some questions about how such an abundance of storage can be used.

One answer may be the advent of upgraded high definition standards that take up even greater amounts of disc space.

The possibility for progressively increasing to higher densities was a major reason that Blu-ray won over its rivals.

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