I would guess this isn't a priority for the industry because gamers themselves don't care. Case in point: gaming monitors. Gaming monitors advertise high-refresh rates and low input lag but rarely color quality. What percentage of gamers use wide gamut monitors or even perform color calibration?
FWIW, I'm a colorist and have very expensive color critical monitors and calibration probes. For GUI monitors I've started recommending gaming panels for suites that don't want to invest in professional graphics displays. Once calibrated these monitors are surprisingly accurate and hold the calibration well (at least as good as professional displays many times more expensive - though still a far cry from color critical displays). The expanded refresh rates are a nice bonus for eye relief as well.
