Apple will never release a new model in less then a year, iPhone 5 will be a year from now and as always better. iPhone 5 will have a new design but I am sure it will keep the 3.5" screen and will not be getting bigger like other phones. I think (and Apple) this is the right size screen then can use one hand to do most of the thing.
What goes up has to comes down, that includes your dick!