the Moto X has a 4.7" in a body that is only slightly bigger than the iPhone 5S. Hopefully apple will be able to at least keep the width of the iPhone 6 similar to the Moto X, and from leaks thus far, it seems like they might be able to. I really like that one-handed ease of use.
Though the need for a circular home button means that the bottom bezel needs to be quite thick. When the bottom bezel is thick, the top bezel will be thick too since Apple seems like to like to keep the top and bottom bezel equal for design aesthetic. I don't really mind though, as long as they make good use of that additional room for things like bigger battery. :/
5S on top of Moto X