Blu-ray and HD DVD are similar in technology. Both use a blue laser to read the information on the disc.

蓝光影碟机和高清数字影碟机采用了相似的技术，都用蓝色雷射光读取影碟上的信息。

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They seemed like extravagant indulgences at the time, but even those evolved into digital voice mail, laptops, DVD and Blue Ray players and all seem almost essential to daily life today.

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Until now, Vudu has only been available through consumer electronics products, like TVs, Blue-ray DVD plays and video game consoles, that carried Vudu.

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While prices of Blue Ray devices escalated, DVD manufacturers were severly affected.

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