Basically, for Apple it's angular resolution of 60 pixels per degree at normal viewing distance. Farther you are, angular resolution of display is higher. For iPhone at 12'', angular resolution is 69 pixels per degree.FWIW,
Higher Rez LCD's are one thing, posters keeping referring to 'RETINA", a marketing ploy by Apple that just means higher resolution LCD panels - be these 4in, 8in, 10in, 11in, 13in on 15in - could Apple actually state clearly how many Pixels per square inch, regardless of how far away you are from the screen, constitutes RETINA - basically its all over the show
It's not really "retinal technology".Will the new iMacs incorporate retinal technology?
I class the current iMac screens as "retina".I think it all depends on what you class as retina, a lot constitutes, but i doubt i if you mean 2x the resolution, I don't think it's practical, or necessary, but i think that it could be a BTO option, but at a high cost.