It prepared the xbox for the New Xbox Experience that is
releasing later this year.
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There's no such thing as an Xbox 380.
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The adapter connects you to Xbox Live but only if you have a
wireless network and if you have a Xbox Live subscription.
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Meh.... The Original Xbox Games are fully playable on Xbox 360.
No add on purchases like the Wii. There have been rumors that some
games don't work. They still have Xbox games on Games on Demand,
though.