Millions buy a Touch or iPhone, presumably 20 million before 2009 starts. This alone makes it more popular than the Gameboy, i say it has more than one advantage over the DS except for the games. A nice game library is all it needs to be a successful game console, we already have the users and now we only have to wait for the SDK and the games.
Apple will never promote it as a game console because it degrades the device, people expect a console to be cheap.
You do realize that the DS ≠ Gameboy right?
So what you are saying is as a gaming device they don't offer anything better than what the DS does. So you expect it to do better at games when its main focus isn't games. Your expecting a general purpose device to do better than a dedicated one? Um, the PSP says hi.
I am excited about iPhone games, but I am also pretty sure it won't put any sort of dent in the Nintendo handheld space.