I really hope the screen size doesn't get bigger, but many people seem to be falling for "bigger is better." Apple probably needs to increase the screen size to "compete," which is unfortunate for two reasons:
1: I don't want to carry a brick around in my pocket.
2: Dustin Curtis makes a good point about the screen size and usability of 3.5" vs bigger screens (http://dcurt.is/2011/10/03/3-point-5-inches/):
Image
With a 3.5" screen, your thumb can reach across the whole screen, thus the iPhone is a "one hand" device. When the screen size increases, you need to use two hands to reach the entire surface.
that dude must have some tiny hands I've handled a GSII and I can easily reach most of the screen with my thumb (even more so than that guy can with his tiny hands on an iphone screen)