Blu-ray discs

[MARX ®]

Floppy discs, CDs, DVDs........
Its now time for blu ray discs...........

Blu-ray Disc is a high-density optical disc format for the storage of digital information, including high-definition video.
The name Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Because of its shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red (650 nm) laser. A single-layer Blu-ray Disc can store 25 gigabytes (GB), over five times the size of a single layer DVD at 4.7 GB. A dual-layer Blu-ray Disc can store 50 GB, almost six times the size of a dual layer DVD at 8.5 GB.
Blu-ray was developed by the Blu-ray Disc Association, a group of leading companies representing consumer electronics, computer hardware, and motion picture production. The standard is covered by several patents belonging to different companies. As of March 2007, a joint licensing agreement for all the relevant patents had not yet been finalized.
As of November 25, 2007, 415 titles had been released on Blu-ray Disc in the United States (32 of those titles have since been discontinued). As of October 9, 2007, 179 titles had been released in Japan, with 55 more titles planned for release.
The Blu-ray standard is currently in a format war with its rival HD DVD, to determine which (if either) of the two formats will become the leading carrier for high-definition content to consumers.

Picture of a re-writable Blu ray disc

[Kingroudy]

i wont decide which format i should use before the HDDVD vs BLUE-RAY war ends.
specially that both technologies are slightly expensive, whether for writers, readers, or even empty discs.