It appears as if the Xbox One will be getting a major upgrade in voice chat quality, and you can see the difference right here, or on Major Nelson's blog. Due to the integration of Skype's audio codec and a better controller (with an improved wireless data transfer rate), a higher quality voice output is achieved. Major Nelson notes that this will not only work with Skype, but multiplayer as well.
Xbox Live [Major Nelson]
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5:00 AM on 07.17.2014