When computer monitors start arriving that are capable of reproducing UDHTV source material properly (or UHDTVs are capable of being connected to computers), the colours that are available to us to work with on a computer will change substantially:
"The Rec. 2020 (UHDTV) color space can reproduce colors that can not be shown with the Rec. 709 (HDTV) color space. In coverage of the CIE 1931 color space the Rec. 2020 color space covers 75.8%, digital cinema covers 53.6%, the Adobe RGB color space covers 52.1%, and Rec. 709 covers 35.9%. Rec. 2020 allows for frame rates up to 120 frames per second (fps).
Might give the printer manufacturers something to think about when it comes to gamut