Not really , you just have to look at how a typical smartphone looked before 2008
Smarthphone is a big word. Most PDA's like the Dell X50, already had design as the iPhone etc. The problem was, they where missing the "phone" part, but technically, a smartphone is just a PDA with a "phone" part. Plenty of people then asked about this.
I never understood in that time, what all those PDA's did not include any Phone. There where very few "smartphone's" aka PDA's with Phone capability, and those did look indeed more like Blackberries.
To me, the iPhone is just a natural evolution of the PDA. Its not revolutionary. But, smart marketing, proper software integration, and a drive to push a product. Something that was missing before with the PDA market.
Ontopic:
That missing home button is creating a massive stir on the Internet. Yet, why did nobody notice anything with those leaked shell covers. If they can leak those, why not a missing home button.
Personally, i do not belief in the "it was Photoshopped" out by mistake theories. Something that big does not get overlooked.
We shall see in a few days.