For the people that argue that the iPhone is perfect the way it is really fall into the quote steve jobs used to build apple and why he never let the consumer tell him how to make products.
When Henry ford built the car and was asked why he didn't ask people what they want, he replied "they would have said I want a faster horse." (goes something like that)
You don't think the screen size is perfect, apple told you it is perfect. Had apple said that a 4.3" was perfect from the get go, everyone would be on the bandwagon.
Point being is that as technology moves forward, perfection is an ever subjective, never attainable, and constantly redefined dream to chase after. While 3.5" may have been the perfect screen in the past, people's needs are changing. Sure some still love the 3.5, but those of us who want a 4-5" phone shouldn't be left hanging in the dust without an iOS device. I know I'm picking up a note here soon also. Funny as I used to swear android was the crappiest product on the market. The step child I could never love no matter how much I tried. However with the note, they really did a great job. Can't wait to get my hands on one.