i'm completely satisfied with my iphone 3g, and i'm sure i'll be just as satisfied with next years model when my contract expires.
Therefore you and Roessnakhan who said "Because people are always unsatisfied.", which you agree with, are wrong.
I'm satisfied with my current iPhone too. It's great. And not everyone is or will be unsatisfied. But you can't deny that there are some people out there who always complain because they build up their hopes for what Apple can push the envelope with. Then Apple releases something that isn't up to their expectations and they flame.