Well, LG, where did this come from, eh? The South Korean giant has just announced that it's developed a new 5.5-inch display that crams in an insane 538 pixels per inch.
This sets a new record for pixel density in smartphones, with the closest panel in something like the HTC One having 'just' (we can say that now) 468 PPI, and the iPhone 5 having a now dismal 326 PPI. LG has also said that the new 5.5-inch high-pixel panel is "only 1.21 millimeters thin with a 1.2 millimeter bezel measured in LCD modules."
This achievement makes it thinner than any other display... in the world. 538 PPI on a 5.5-inch panel gives us a resolution of 2560x1440, on a mobile phone, which is the same resolution of the monitor I'm writing this news on. Crazy stuff. Life must be Good at LG right now.