The more I think about the iPhone, the more I realize that it will never (in it's current form) replace Treos, WinMobile devices, or Blackberrys, despite Steve's assertions that the iPhone is "smarter" than they are.
However, the iPhone WILL still be a runaway success, as it will be marketed at all those people who DON'T have a smartphone, and currently use lackluster phones from Moto, Nokia, LG and others. That's a LOT more than 1% of the market (I would wager more like 80-90%!), which Apple is aiming for right now. So, even though it won't have the expandability of true smartphones, it will still have enough built-in and "Apple approved" apps to make it great for much of the phone-buying public.
However, the iPhone WILL still be a runaway success, as it will be marketed at all those people who DON'T have a smartphone, and currently use lackluster phones from Moto, Nokia, LG and others. That's a LOT more than 1% of the market (I would wager more like 80-90%!), which Apple is aiming for right now. So, even though it won't have the expandability of true smartphones, it will still have enough built-in and "Apple approved" apps to make it great for much of the phone-buying public.