A refreshed line of iMacs -- and the possible introduction of an iMac Pro -- were some of the most teased announcements prior to WWDC. Earlier this year, Phil Schiller, Apple's SVP of Worldwide Marketing, promised that the company would produce iMacs specifically for the professional customer. The new iMacs Apple announced today at WWDC aren't quite that, but they do represent a significant upgrade over the older models.
Overall, we're looking at faster machines with better displays in the same enclosure. Those screens feature 500 nits (43 percent brighter than the previous generation) with 1 billion colors. Discrete graphics are now standard on the 4K 21.5-inch. The line is also going to use Intel's Kaby Lake processors and now allow up to 32GB of RAM on the 21.5-inch and up to 64GB on the 27-inch.