I have a Thunderbolt Display and recently sold my 15-inch Retina MacBook Pro to buy the 2013 13-inch Air, but for the life of me I can't really discern a clear difference between the Air's display and the rMBP's display. At my normal viewing distance, text and images look almost as good on the 2013 Air as they do on the rMBP, just that there is a certain intangible clarity and brightness to rMBP colors at time. In normal usage, I don't notice much of a difference, though. However, the display on the 2013 Air is definitely much better than the washed out one on my go's 2012 Air. The colors on the TBD are a bit more deeper, for lack of the proper word, than any of the laptops, but honestly, in my day-to-day word processing, I don't notice much of a difference, except for the increased space. Do I have really bad eyesight?