InUseful published a usability report on the iPhone.
“What is it then that makes the iPhone different? Most importantly, it has removed one level of abstraction by allowing the user to act on objects using the finger directly on the phone’s surface. The difference between this and having to press keys on a keyboard and watch the screen to see what happens is striking. Instead of having to press one key to focus on the list item representing your contact and then clicking another key to make the call, the iPhone allows you to actually click the contact right on the screen. To scroll, you pull the list itself instead of clicking a down-key, and to flip between pictures in the album, you drag them from one side to another.”
Link: Free iPhone usability report (inuseful.se)
