I made that choice when I connected a wide gamut NEC PA272w to my Mac Pro. Up to this point it’s been a conscious choice to buy a wide gamut monitor.
I had questions about the P3 color gamut of the new iMac, so I went over to my local Apple Store to check it out.
The Late 2015 Retina iMac includes the first wide gamut display that Apple has made for a Mac, able to reproduce colors well outside the sRGB color gamut.