Originally rumours pointed toward the Samsung Galaxy S5 coming with a Quad HD (1440 x 2560 pixels) Super AMOLED display. After the launch, we knew it wouldn’t be coming in the Galaxy S5 so rumour began to point toward the “luxury” F series of smartphones and now others believe it may start off in the Galaxy Note 4.
One manufacturer has jumped in ahead of Samsung, it’s a Taiwanese company called AU Optronics, a panel manufacturer. Samsung is one of its customers, alongside many others, and it has managed to beat Samsung to the punch.
AU Optronics released a press release stating it had "successfully developed the world's highest-resolution 5.7-inch WQHD AMOLED panel." The screen has 1440 x 2560 pixel resolution and comes in at 513ppi.
Oppo’s Find 7 has beaten the pixel resolution already with a 5.5-inch QHD 538ppi screen, but that's using LCD rather than OLED technology.
AU Optronics has also made a breakthrough with in-cell technology which means the displays can be thinner than ever before. This new display comes in at 0.57mm. Could we begin to see the new display on the Samsung Galaxy Note 4? It’s possible.
On the other hand, manufacturers need to nail battery life before fully adapting these kinds of displays into handsets. It's all well and good creating a display which is more beautiful and thinner than we’ve ever seen before, but the better the screen quality, the more battery life it’s going to use up - not to mention most content is not optimised to take advantage of these higher resolutions yet.