Except the Pippin failed miserably?
They already sell their old games already through the Virtual Console. And what would Apple want with a company hemorrhaging money left and right? Furthermore, while there are good quality games from the NES, SNES, N64 and GameCube eras, Nintendo would only be able to sell first party games on iOS, and the control schema on a touch screen device is not the most conductive to most games? Consider the number of buttons on any of those games. Then imagine the time and money, it would take retool those games to reduce the number of pushes. Then would Nintendo redesign the game or would they keep the same game as 30 years ago?