I wonder what size screen will stop being considered acceptable for a phone and therefore,becomes a tablet. I remember laughing out loud when I saw the dell phone that came out a few months ago, don't remember the name, or exact screen size, but it looked just plain hilarious!
Anyways, I'd like to see a 4" screen too, but I DON'T want, within a few generations, an iPad sized iPhone. Not sure where the line is exactly, maybe it's 4", but not much more than that.