Just how many pixels can you cram into a smartphone display? LG is apparently determined to find out as it announced on Wednesday that it’s developed a new 5.5-inch display that has a whopping 538 pixels per inch, which sets a record for pixel density on smartphones. Of course, with displays that are as small as smartphones it’s fair to ask whether most people will really notice the difference between a screen that has 538 ppi and one that has 468 ppi such as the HTC One. LG also said that its new panel is “only 1.21 millimeters thin with a 1.2 millimeter bezel measured in LCD modules,” which makes it thinner than any other display in the world. The

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