iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Toshiba Introduces New 6.1-Inch Display at 498 PPI
Magnified comparison of Toshiba's new 498 ppi display with lower-resolution displays
Toshiba is now pushing the idea even further, today introducing a new 6.1-inch display offering a resolution of 2560 x 1600, coming in at 498 ppi.
This newly-developed world-class, high-definition LCD panel is based on our processing techniques for forming fine-pitch and high-performance, low-temperature poly-silicon (LTPS) thin-film transistors (TFT) on glass substrates, and other precise fabrication techniques which have been cultivated over the years. This direct-view LCD panel achieves high-definition images with photographic quality, and although the images are displayed in 2D format, they impart a sense of depth and realism.Apple obviously does not currently offer a mobile product in the range of 6.1 inches and other considerations such as ensuring a smooth transition from lower-resolution displays would likely preclude the company from utilizing this exact display, but it is clear that the technology is advancing rapidly to enable ever higher display quality. As mobile devices continue to see increased graphics capabilities and costs fall into line with existing technologies, such ultra high resolution displays are likely to see significant adoption.