The South Korean Game Rating body has listed Playdead's Limbo for release on Xbox One.
According to the GRAC listing found by lifelower on Twitter, Microsoft has sent the game to the ratings body for approval, and that's the extent of the information provided.
Rating submissions are, usually, a strong indicator of an impending release, but until an official confirmation is made it's best to stave off excitement until that time. Especially since it may be a regional instead of worldwide release. That's always a possibility, not usually the case.
A Mac version was also released in 2012 alongside a Linux version.