Microsoft Replacing Xbox Live Voice Chat with Skype
 

In a move to consolidate its communications technology, Microsoft will be replacing voice chat with Skype. Microsoft has been moving in the direction of voice communications consolidation within the company since the acquisition of Skype in 2011. This means that Skype will become the default chat service on the next generation Xbox console as well as on PC and tablets, the person said.

http://www.hardocp.com/news/2013/01/...ce_chat_skype/