To attain higher screen resolution, display manufacturers need to use low-temperature polysilicon (LTPS) technology. While LG Display already using their AH-IPS technology to produce displays of over 500ppi, Sharp and Japan Display are already starting to try out the mass production of a 6 inch 2560 x 1600 resolution display.
6-inch 2560 x 1600 resolution display is not just a gimmick. Earlier reports stated that in normal distance, the human eye almost cannot perceive the difference between a 1080p and 720p display. However, the latest survey shows that smartphone users who are 30 years of age and younger are able to fully differentiate between a 400ppi and a 500ppi display.