[This is assuming the 4" screen rumors are correct] Most rumors say that if the screen gets bigger the resolution will not change. If the resolution changes, the developers will have to change their apps and it could be one big mess. Ergo it makes the most sense to increase the size but maintain the pixels, right? No. I'll give you an example of why this makes no sense: Let's just say a new business is looking in a mall for a place to open shop. They contact the mall and are quoted an x square meter space. It's just what they were looking for so they go ahead and pick out all the furniture and products that they're going to sell. A few weeks later the mall calls back and says they made a mistake - the space is actually 30% larger than what they originally said. The business has two options: 1) Upscale everything - the tables, the cash register, the products - by 30% 2) Keep everything the same size but actually take advantage of the space by adding 30% more things They obviously chose the second option. The whole point of a larger screen is more screen real estate. If Apple chooses to maintain the resolution, all the icons, the words, the buttons would just be xx% larger and this would not take advantage of the extra space in any way. A larger display with the same resolution is pointless. It would show the same amount of content, but in a larger space, and people would still complain about how small the screen is because there would be no real advantage.