Today Apple announced that it will be including 4K displays in the 21.5 inch iMac and 5K displays in all of the 27 inch iMacs.

In Apple’s own words:

 The updated iMacs also feature more powerful processors and graphics, two Thunderbolt® 2 ports and new storage options that make the high-performance Fusion Drive even more affordable.

Sounds like a good update all around!