Presumed front panel for the next iPhone leaked, Retina Display moniker feels threatened

The panel is said to have an opening for a 4" display, and we guess the other two models being tested are one with the standard 3.5-incher, and one for the cheaper iPhone we heard so much about already. The bezel also looks way thinner, especially on the sides, so the overall dimension might not change much.
If the next iPhone has a version with a 4" screen, and keeps the same 640x960 resolution, it will go down to about 285ppi, which is below the Retina Display specs. Not that it is dealbreaker, except for marketing purposes, considering the next best thing currently on the market is the 540x960 qHD res of the Motorola ATRIX 4G, which, however, is rumored to have the PenTile matrix arrangement that effectively lowers the official resolution, since it uses less subpixels per pixel to achieve it.
If Apple wants to keep the 300ppi + specs, it will have to grow the res to 1097 pixels, which will really mess up with what most apps for the iPhone 4 are targeting. Or, alternatively, it can be bumped on both sides to 768x1024 pixels (iPad's resolution), and achieve 320ppi. Is it possible and worth it doing that, as opposed to just not calling the alleged 4-incher Retina Display anymore? We'll leave that for Apple to decide.
LG has demonstrated an IPS-LCD last summer, of the 3.98" size, with 394ppi, and has named it UHD display, so if a 4" iPhone is to appear this summer, and the display can be mass produced on time, this one is most likely to appear in it. It would mean an impressive 1000+ pixel count both horizontally and vertically, so we can't wait for more leaks (or tips) to shed some light on that.
For more information about the merits of the different display technologies and resolutions, you can read our article here.
source: PCMag & LG