Although quite a bit smaller than the full BT.2020 gamut, it still contains significantly more colors than the SDR gamut. Today's HDR-equipped displays instead settle for the smaller DCI-P3 gamut, which can be reproduced by OLEDs and LCDs as well as projectors. That means expensive laser projectors are the only display devices currently capable of showing all the colors involved -and only certain laser projectors with lasers at the right wavelengths at that. The ultimate goal here is the triangle dubbed “BT.2020.” The problem is that currently, the only way to produce the red, green, and blue colors required for this gamut is to use lasers (which is cool, we know, but impractical). One of the two concepts behind HDR is to expand that triangle of red, green, and blue from the current small one dubbed "BT.709" to something closer to filling the entire range of colors that humans can see (see the chart above).
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