Edward Tufte's short video on the iPhone will help you understand why the iPhone is such an overwhelming success.
(This is an iPhone hacked with Jailbreak, so some of the apps you see are 3rd-party ones. Tufte says, "Don't try this at home.")
"In a world of clunky cell phone interfaces, the elegant iPhone opens with a high-resolution image provided by the viewer."
"No computer administrative debris, at all."
"Content is the interface, information is the interface, not computer administrative debris."
Some of the iPhone apps are cartoony, relying on low Excel- and Powerpoint-resolutions. It would be better to use the iPhones excellent screen resolution (163 dpi) to show finer-grained information that is useful ...
"To clarify, add detail."
"Clutter and overload are not an attribute of information; they are failures of design."
iPhone is a showcase for information-design thoughtfulness. It is therefore surprising to me why the people continue to seem reluctant to champion the product's successes. I conclude that good information architecture is not all that obvious to us.
"If the information is in chaos, don't start throwing out information. Instead, fix the design. And that is exactly what the iPhone platform has done."
Tufte places it in perspective with his own form of elegant clarity about what information is and what it is not.