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As for Blu-Ray don't hold your breath that Technology is owned by Sony and I don't think they would lend or sell it (fairly) to one of its competitors.
It's not owned by Sony; it was a joint development project by Hitachi, LG Electronics, Matsushita Electric Industrial, Pioneer Corporation, Philips, Samsung, Sharp, Sony, and Thomson Multimedia. As for Nintendo using this medium, it would also be alot easier than you think. Now that the technology is out, obviously Nintendo could easily research it and perfect it to their needs.