Some folks said the same thing about the iPad. Who needs a tablet when I've got a laptop and a smartphone?
What strikes me is that this person is lambasting a product that he hasn't tried first hand. He hasn't lived with it for a week to see how it benefits or hinders his life. It's fine if you don't want one (I don't have a smartphone by choice), but realize that just because you don't want the latest new fangled gadget doesn't mean that it won't have mass market appeal.