My Ps3 stands tall with my WII U... But i also have my nvidia shield tv set up... which is complicated since my tv has not enough hdmi inputs. So my PSvita tv, WII U PS3, and Sheild tv ALL use hdmi which i needed a spliter cable hub for to get them all set up. (Always get the one with the remote to switch inputs, or you may regret it later.)
I have a original xbox, PS2, and Gamecube that i havent touched in some years, cause no controllers.
Now my mom in the living room, she has a wii that she has with hdmi converstion and the ouya, and chromecast, i set up myself, I needed the WII HDMI cause the tv only has one Componet cable for The cable box, so that kinda sucks, Least it has 3 HDMI but i may need more. I don't even wanna go into details for my father's set up, is awful, Infact they are all awful, but i never did his, he did himself, i only did my room and the living room.
I never used a PC monitor, only TV monitor, My brother in his house had used a PC monitor for playing games on, but i mean is not really important. Get a good monitor, LIke A smart tv or anything with a game mode, and you are set, i still use a over 10 year outdated vizio monitor and i never had problems with it.
If you wanna play games on pc, just buy a pc computer.