Apple, fairly silently, just released updated iMacs. What makes them worth mentioning here is their displays, which used to be good for photo editing, and should now be pretty awesome for photo editing. The 21.5" display jumped from 1080p to 4K. The 27" is now 5K as standard, instead of being an option. Both now have a wider than sRGB color gamut... DCI-P3.

Apple just says "25% more colors".

Ars Technica, thankfully, says a bit more: "Another addition that comes to both the 4K and 5K iMacs is a wider color gamut—previous iMacs used the sRGB color space, but the new Retina models support "over 99 percent" of the DCI-P3 color space common in digital movie theaters. DCI-P3 encompasses the entire sRGB color space but is capable of displaying more shades of red and green (which also affects secondary and tertiary colors like yellow, orange, magenta, and cyan, though blues in DCI-P3 are roughly the same as in sRGB).To support this wider color gamut, Apple has switched away from using standard white LEDs for backlighting, which typically combine a blue LED with a yellow phosphor to create white. Apple is now using red-green phosphor LEDs to expand the color gamut"