On iPhones and Newtons
Michael Simon at Mac | Life takes a cautionary look at the iPhone from the perspective of the failed Newton. In the months before its launch, the Newton generated a lot of buzz and excitement, and boasted similar functionality. As Mr. Simon notes, the original Newton introductory video states, "The Newton MessagePad can find a phone number and dial the phone for you, fax a note, format a letter, and even set up a lunch appointment."
It's an interesting comparison, but I don't think it's entirely fair. When the Newton was introduced, not may people – if any – knew what a "PDA" was. The concept was even new for Apple.
Conversely, everyone knows what a cell phone is, and nearly everyone has used one. While it's true that Apple has a lot riding on the iPhone – you could argue even more so than the Newton – its path will be very different.