i agree that most people have a separate living room or office. But as a gamer, or a person with a man cave, why wouldnt you have your PC right with your gaming stuff? especially now a days with twitch, you tube and skype...not to mention vsn. its just a major plus to have my pc in a spot where i can turn and look at it while playing console games.
if i recall, isnt your mancave more like a gameroom style room where you entertain friends and shit?