I use four monitors for my WFH setup with a total of 11.8m pixels. Three 6k monitors is 37.3m pixels, more than three times what I've got. I'd be seriously considering this if I could run all four, but for now the hackintosh lives on.
lol, in the example promo photo the third very expensive monitor is used to show a flyer promoting the music creation event being depicted. Great use case.