Like PS4, Xbox 720 will launch with no backwards compatibility, say latest batch of rumours

Until Microsoft announces the Xbox 720 , rumours will persist. However, few are as saddening to hear as the latest, especially if, like us, you've built up a meaty and mighty library of Xbox 360 games over the last few years.

http://www.pocket-lint.com/news/50781/xbox-720-no-backwards-compatibility