Sources are reporting that Microsoft is replacing the Design Lead for the XBOX platform ahead of the rumored 2013 release of the, “XBOX 720″. Dan Coyler, known for his push for a unified UI and Experience across all platforms,  has worked on the XBOX team since 1999. Coyner originally joined Microsoft in 1995 after leaving Nintendo. CNET reports that he will be replaced by Emma Williams, who was recently in charge of the latest XBOX Dashboard redesign.

[Via CNET]