[Seth]

Well, I assume a majority of the games on the next gameboy will be 3D. So, definately a larger screen.

Basically, the same size of the original gba only with the gba sp flip up screen. That's the only way i can see them getting the screen bigger and still allowing the unit to be comfortable with four buttons. Something like this...


and also a 'minidisc' type format so it doesn't skip. Although, i'm betting nintendo will still be going with the cartdridge setup.