I expect Apple to move to a curved back design with the iPhone 6 (and a larger screen). The iPhone 4 looks good naked, but put it in a case and it's looks like nothing I'd want to put in my hand or pocket. With a case, it has as much ergonomics as a brick.My reason why i think the 3GS is better is that it has a much more solid feel to it. I dropped my iphone4 and it shattered. There is just something about the 3GS that gives you that " Good feeling". I cant explain it.