Apple's claims behind the iPhone 4's Retina Display aren't completely true, display research veteran Raymond Soneira claimed today. While Apple claims that 300 pixels per inch (PPI) is the limit of the human retina and that the iPhone 4's 326PPI easily exceeds it, the DisplayMate president notes that the resolution would need to reach 477PPI for the pixels to truly be 'invisible' to a healthy human eye. Apple's claims don't become completely true until about 1.5 feet from the LCD.
