The only reason that we haven't seen high-resolution display on the consumer market before the iPad 3 and iPhone 4 has to do with software support and nothing e

The only reason that we haven't seen high-resolution display on the consumer market before the iPad 3 and iPhone 4 has to do with software support and nothing else. This was a direct result of the LCD since the resolution on an LCD is fixed the only way a consumer could increase the number of pixels on a device was to get a larger device (display). And Apple have taken the easy way by scaling the solution by four so that scaling the graphics is trivial. Not saying that it's a bad way, it has advantages and disadvantages but doing it the simple way is the quickest way to make way for high resolution devices.