Agreed. People are complaining about heat problems with the current model, and apparently Apple is hell bent on making it thinner (even more heat problems). It's simply not realistic to expect that they'd put in a 4K display with another 5 million pixels on top of the current 3.7 million.I don't want them to do a retina screen unless they are willing to put a pair of GPUs in SLI/Crossfire with a decent amount of Video Ram (say 2GB on the 21.5 and 4gb on the 27") to drive that many pixels.