Here is a detailed comparison between the Retina Display in the iPad 3 and the IPS LCD screen in the iPad 2

  So far I have only seen some fairly basic comparisons between the Retina Display in the iPad 3 and the screen of the iPad 2 tablet, but those from DisplayMate show us how much Apple has improved the screen of the new tablet. In addition to doubling the resolution, those from Apple have also improved the color saturation and everything looks much more natural on the screen of our iDevices. The ones from DisplayMate they did here a detailed comparison of the screens of the two tablets and the image above will give you an idea of ​​the change you will feel when you switch from iPad 2 to iPad 3.

Apple has taken the very good display on the iPad 2 and dramatically improved two of its major weak points: sharpness and color saturation – they are now state-of-the-art. 
But there's more... the new iPad's picture quality, color accuracy, and gray scale are not only much better than any other Tablet or Smartphone, it's also much better than most HDTVs, laptops, and monitors. In fact with some minor calibration tweaks the new iPad would qualify as a studio reference monitor.

  The new screen consumes almost 3 times more energy than the screen of the iPad 2 tablet and can work for much shorter periods of time when the brightness is set to the maximum value. The bad part is that when we use the tablet in direct sunlight we will have problems with reading texts or viewing images, the screen of the new tablet having poorer results than the screen of the iPhone 4 in this regard. All in all, the Retina Display in the iPad 3 is much, much better than any other screen produced by Apple, but I don't think that surprises anyone.