I really don't think there will be any huge jumps in size, 4.7-5.0 would be nice but who knows with Apple, When you think that they went from the 3.5 of the 4s to to 4.0 with iPhone 5 that wasn't a big increase, I still think though that this will be the year when they give us a nice big screen.....Well.... bigger at any rate, I can't see that they will trot out yet another phone with a 4.0 screen.