So iPhone 6 plus uses virtual resolution 1242x2208 and then downsamples it into 1080p. In this article he claims: > It is important to note that there is no decrease in final physical > size from the original UI rendering to the final down-sampled display. > A status bar with height of 20pt will appear about the same inch size > on iPhone 6 and iPhone 6+. Its truly like comparison of iPhone 4 to > iPhone 5 instead of iPad Air against iPad mini in respect of UI > physical size. Downsampling is not the same with downscaling!! To > prove my point, lets take a look at 1080px by 1920px in 401ppi and > 462ppi. Diagonal pixel of this resolution is 2202.9px. 2202.9px in > 401ppi will yield 5.49", while 2202.9px in 462ppi will yield 4.77" > display. Hence 1080px by 1920px in 401ppi is physically as large as > 1242px by 2208px in 462ppi. https://medium.com/@brucewangsg/the-curious-case-of-iphone-6-1080p-display-b33dac5bbcb6 I read again and again and still have no idea why he can claim that. 401ppi on 1080p in 5.5" 461ppi on 1242p in 5.5" diagonal px of 1080p is 2202.9/401=5.49 diagonal px of 1242p is 2533.3/461=5.49 Is that the reason why he says that UI sizes will remain physically the same even if Apple used 1242p panel? Thanks.