X-bit Labs writes new rumors indicate a next-generation Xbox console may arrive in 2013:
Microsoft Corp. plans to release its next-generation Xbox video-game console sometimes in 2013, according to a report that cites industrial sources among game and tool developers. It is highly likely that Microsoft will remain tight-lipped about the console which may carry Xbox 720 name for a long time and is projected to reveal it in mid-2013, months ahead of the release.
Multiple sources across the industry, from processor chip manufacturers to middleware firms, have told Develop web-site they expect the console to be fully unveiled at E3 2013, months before its release. Typically, video game console designers roll-out new consoles during holiday season, so the U.S. should expect Xbox Next to be available by December, 2013. Still, even Microsoft itself most probably has not yet set its launch plans for its future console.