Even by their standards, the Apple iMac with Retina Display is staggering. The world’s most advanced desktop operating system, unveiled just yesterday, just got more advanced. The all-in- one package sports a 27-inch oxide TFT display with a Retina 5K display panel and 5,120 x 2,880 resolution all in a screen whose outer edge is just 5mm thick. Not only is it pre-loaded with a heap of apps, it’s 30% more energy efficient too.