One point that ppl seem to have missed on the actual screen itself :
MONITOR : Sharper display, faster updates (Good for games) , Usually a narrower viewing angle, lower overall brightness, and usually very little "auto image processing". The more responsive "pixels" require a bit more structure and block more light, and the lack of processing means you see what the signal sends.
TV : Softer display, SLOWER updates (Good for movies) , Usually a WIDER veining angle, better brightness, and often at last SOME kind of auto image adjustment / color correction that you usually CANNOT fully control, as most manufacturers use this to make their product look better in show rooms and DON'T allow all of it to be turned off. The "pixels" aren't designed with response & performance in mind, this makes them thinner, cheaper and generally letting more light through, this has the double bonus for TV usage of widening your viewing angle, and letting more light through so the images are in effect brighter, but any serious gamer WILL be very frustrated by the blurriness on high motion - especially in an FPS type of environment.
This is of course a generalization, YES, know it all ass-tards, I'm sure you have ONE monitor that's X, or one TV that's Y, but I'm not talking about every piece of hardware ever made - I'm talking about the market in general, and why they still have 2 products as TV's / and MONITORS - And not just sell as one universal product " DISPLAYS".