how about controlling tiny metallic weapons of war with your Nintendo DS? or controlling a WHOLE slew of them?
think table top gaming, only you got a number of moving/mechanically animated units, all controlled through Nintendo DS wifi?
...or even better, munch on this. INCLUDE AUGMENTED REALITY. slap on Yu-Gi-Oh. Now all your yu-gi-oh cards are AR cards, and you slap em on the table, and watch on your screen as the cards come to life and do battle.
but that's an entirely different idea. hm. maybe i should email whoever makes Yu-Gi-Oh that idea. i could seriously earn some cash for that.