The head of our bed is a good 20' from the flat panel Vizio mounted over the mantle of the fireplace. Even the couch between is a good 10' from the TV.

Bigger is better! .....And my wife's late night computer bridge games in her office have opened to me all sorts of hitherto "Do we have to watch that?" unviewable sports, many in HD. While from the couch I can see how much tape the linemen have used on the fingers, from the bed, a big screen and HD have elevated football to a new plane.