It's definitely an interesting topic and a nice high level overview of the problems of colour and colour spaces. I like the 4 point colour wheel in some way, but I don't entirely see the benefits.

From a computer vision perspective, this representation still has problems (as do all colour spaces). Look at how massive the green space is. There's 4-5 greenish slices that are close to each other, yet only 1 slice for yellow and 2ish for red. Red is the colour humans see "best", physiologically it should have the largest representation, whereas blue should be smallest.

From the simpler side (i.e. a basic colour wheel application), I'm not sure if this makes it much easier or faster for me to find a colour.

In any case, the article is very nice high level overview of a fascinating problem.