If I want a music player, I'll go buy a goddamn music player.
If I want a portable gaming device, I'll go buy a goddamn portable.
If I want a goddamn cellphone, I'll go buy the cheapest goddamn cellphone I can find. >=\
I don't really need it all in one. Especially since the DS has a much sexier lineup than the iPhone. Then again, the iPhone isn't that hard to beat in that respect.