It seems there is already a digital version of Call of Duty Ghosts upcoming with a dual license for Xbox 360 and Xbox One which comes with a free COD branded scarf.
Q. When I upgrade from digital download for Xbox 360 to digital download for Xbox One, will my digital Xbox 360 game license be deactivated?
A. No, Xbox 360 game license will not be deactivated. Both game licenses will be retained.
This essentially means that should you buy the license, you will be buying the game for both consoles simultaneously. Sweet idea?