Well, yes. All I'm saying is that a smartphone and a Palm Pilot are both PDAs in the same way that the IBM PC-XT and my laptop are both personal computers. Yes, they've changed a lot. But they're still fundamentally the same thing and go by the same name. At no moment along the evolution of the PC did we get something shoved down our throats by a marketing weenie as being something completely NEW!! because it never was. Then Apple realized that they could monetize the cell phone market by slapping "teenager" features into a PDA, polishing it until it blinds you, and never uttering the term PDA in the marketing materials.
But it's not about marketing, or "teenager" features, it's about utility, meaning convenience. I'm not a teenager (far from it), and consequently I have owned and used a Psion 3a and a Psion 5. Both failed because they didn't do enough. They weren't phones, and they didn't have wireless networking. Sure, they could plug into phones, but who wants to plug their PDA into a phone and do a modem dial up?
The advance of humanity is not about technical features, but about the convenient delivery of technology at the point of use.
Until you make your technology convenient to use, it is not useful. This is a lesson engineers everywhere must always remember.
I'm not "blinded" by Apple marketing, I simply like my iPhone because it does helpful things where and when I need, with a minimum of friction or inconvenience. The iPhone succeeded not because of a powerful marketing machine, but because design engineers realized that market appeal is all about packaging attractive features and delivering them in an easy to use format. The iPhone didn't need selling, it sold itself.