Two Tv's as monitors

My son uses TV’s. Not anything in audio, he uses this for games ( something I have never done even with my original VIC 20 and Commodore 64). He has a rather complex set of video cards and 3 30" LED Tv’s and a 46" overhead tv. Looks amazing, remarkably bright ,colorful and contrasted. He routes audio through a Sony 7.1 receiver. Stuff he showed me on YouTube was amazing. my 20" dell monitors have a satin surface to the monitors and his LED sets have a glossy screen and it is a very nice way to go. The sharpness is terrific. If I had a way to justify the costs, I would do it in a second.