According to sources, iPhone 5S (or iPhone 6) or to have a more narrow screen frame, is now preparing, will ship in September. In addition, the product also has a screen 1.5 million pixels, compared to nearly 730,000 iPhone 5 the number of pixels, if not the screen size continues to increase, the resolution will be greatly improved.
Doubling the pixels does not equate to doubling the resolution of the display. To get to 1.5 million pixels, Apple would have to increase the resolution by 44% in each dimension. This appears very unlikely.
However, if Apple is planning to increase the size of the display on the next generation iPhone it may need to introduce a resolution that doesn't translate nicely from previous generation devices. This would be a difficult transition for developers; however, given the popularity of large screen devices, Apple may not have a choice.
Typically, Apple has introduced minor physical changes the year after a major redesign. Thus the iPhone 5S is widely expected to retain the same physical appearance.
If you're interested in seeing what an iPhone with an edge-to-edge display might look like, check out this concept.
Read More [via MacRumors]