A 4" screen can fit on the iPhone with no change at all in the dimensions of the phone. 3-3/8" x 2-1/4" yields a 4" screen and the aspect ratio would be the same as the existing screen. On the iPhone 4 there would still be room for a 1-1/2mm bezel and on the 3GS the bezel would be almost 2mm. I'm currently using a Griffin Elan case and even with the reduced bezel the same case could be used with no re-design whatsoever. Yes, the ear piece and/or the home button would need to move but only by 1/8". If they both moved then they'd both move by only 1/6". What is the big complaint about this scenario?