When extended band-width in video is discussed, BT.1886 gets mentioned. What is it?
SpectraCal has a nice whitepaper on the subject.
Lest there be any confusion, SMPTE specifies a gamut, so this is not going to be in the DCI projector for movies for a while. But some clever cable box or satellite group might use it to make the darks better in an alternative content feed, for example.