Me and a friend of mine were thinking and it makes perfect sense that they would developing a secret handheld system. Also, I have some strange proof of it. If you have ever played Conker's live and reloaded for the xbox you might should let Conker just stand around for awhile. After, a few minutes he'll do a few odd things but givin enough time he will pull out a handheld game device. It says xbox and microsoft all over it. He plays it for awhile and then when you make him move he puts it up. This might have been a small clue that the yare developing one because we all know microsoft is kind of crazy aobut advertising. Just imagine playing halo ce and halo 2 just sitting around anywhere.