
2014 gave us the first smartphones with a Quad HD (2560 x 1440) display, but that's not good enough is it? I am thinking 700+ ppi makes a lot more sense doesn't it? Yup, I am talking Ultra HD baby, as in 4K. Well Samsung seems to agree as they are working on a 5.9-inch Super AMOLED display that will sport a resolution of 3840 x 2160 and a ppi of 746.
This is hardly surprising since Samsung did reveal a roadmap (above) during their Analyst Day last year. It does show an UHD display for sometime in 2015. If Samsung does pull this off, expect to see it on the Galaxy Note 5.
Overkill? Possibly, but with Samsung's phones allowing you to display multiple apps at the same time on the display, it actually is utilized. It means that you could shows 4 pop up apps on the display at the same time giving you a resolution of 960 x 540 (qHD) for each app. Displaying 3 apps at the same time would give you 720p each. So you see, you do need it :-)
source: Phone Arena
Honestly I dont care all most people want is better battery life. And the smartphone maker who can make a smartphone last more then a day after er heavy use will sell more phones then any other maker.