If there is a whiff of validity of that gameboy GC rumor, and some Nintendo portable will indeed incoporate gamecube technology, I hope in reality its the DS successor (and not some single screened gameboy) that has the gamecube chipset inside (or some derivative). Imagine an unfettered ability to display console quality 3d on two screens. I won't try giving examples of how various genres would benefit, because I'm lazy, but I think it would be enormously interesting to see what Nintendo has up its sleeve for the DS brand in the years to come.