I was curious to know exactly how iOS would be represented on a 4.7-inch display, so I decided to make an iPhone 6 simulator. This "simulator" takes the 4.7-inch Moto X and places it behind what is rumored to be the bezel for Apple's upcoming iPhone 6. It has been reported that most of the user-interface will be upscaled with the possibility of certain apps being revamped to take advantage of the extra space.
It has been noted that some apps may end up getting their user-interface simply upscaled, while some apps might see some UI tweaks thanks to the larger screen area to work with. It has also been reported that Apple's next iPhone will feature a resolution of 1704 x 960, giving a 4.7-inch model a PPI of 416, and a 5.5-inch iPhone a 356 PPI.
The iPhone 6 is expected to be announced later this year with a larger screen, an improved camera an upgraded processor, and more.