TV's are perfectly acceptable if you aren't a highly competitive player. I game mostly single player games and I don't notice any input lag with my TV so its perfect. I have a powered usb port right by my couch and a nice wooden surface that I use my mouse from with my keyboard in lap.
Best part about gaming on a 46 inch tv? A real home theater surround sound system. To me it sets it apart so much that when I have to use headphones I'm saddened. And I'm not talking about those home theater in a boxes, I'm talking a real receiver with passive floorstanding and bookshelf speakers with a powered sub right behind the couch.
So true. I don't play online competitive hardly at all. 95% of my gaming is either single player or multiplayer co-op. I do not notice any input lag at all on my LED and after gaming on a 55" screen on my nice, comfortable couch, sitting at a computer desk, looking at a 27" monitor just seems like too much of an downgrade... I have the choice to do either, but, the only time I game on my 27" monitor is when the game doesn't support a gamepad.
Big screen, max-setting PC gaming ftw!
"Even if you go by the cheapest price the game has ever been anywhere, psn+ would still be cheaper by at least 3 fold". DemonDog on psn+ vs. Steam