The moto droid has a PPI of 265. Well under that of the iPhone 4. Here's the wiki on PPI, I suggest you read it as some of your terminology is flawed.
It is neither flawed nor that hard to understand. It's actually widely known information.
I am using the exact same terminology as Apple. They made up the term "retina display" to mean one with which a normal person (not even perfect eyesight) is unable to discern pixels when viewing the display at a certain distance.
“It turns out there’s a magic number right around 300 pixels per inch, that when you hold something around to 10 to 12 inches away from your eyes, is the limit of the human retina to differentiate the pixels,”
Jobs said.
In other words, at 326PPI and 11" Apple says their display matched what people traditionally called "print quality", or 300 DPI/PPI at a distance of 12".
Code:
326 PPI |-----------| 11" == retinal (using one dash = 1 inch)
300 PPI |------------| 12" == print quality (retinal)
As you move further away from a display, of course, pixels can be bigger to get the same can't-tell-a-pixel effect. Heck, pixels can probably be the size of footballs if you look at them from a mile away!
At 265PPI (Droid) you only have to move 1.5" further away from the display for the pixels to look the same to the viewer as the 300PPI one does at 12". In other words, to hit Apple's so-called "retinal resolution" limit.
Code:
265 PPI |-------------.| 13.5" == retinal
This is all assuming you believe Apple's facts basis anyway. There was a huge
controversy about Apple's claim of hitting retinal resolution at all when using their specified distance.
In June 2010, Apple Computer announced and launched the iPhone 4, with its “Retina” LED-backlit LCD boasting 326 PPI (960×640, 3½″ diagonal, each pixel only 78 μm), arguably the highest display pixel density actually available to the general public in a mass market device to date, if not all that much higher than the Toshiba Portégé G900.[2] [3] - WikiPedia
Try this Wiki page instead:
List of displays by pixel density.
The LU1400 phone from 2008, also with an LCD display made by LG, had a resolution of 333PPI, more than the iPhone 4.
(Perhaps it's what caused Apple to ask LG to do the iPhone 4 display, after Samsung said they couldn't make enough Super AMOLEDs in time.)
