In a theater, you would be maybe 20 feet away from screen, the first row, go up on stage and watch it, 5-7 feet way and it would not look good, contrast, color,etc.
People would say that is silly, too close.
I'm on 42 inch hdtv around 4-5 feet back, now make picture 3x bigger, go back 3x to get same effect. If I move closer to 1 foot on 42 inch I see the tiny squares, try it on your hdtv, colors don't look good, and thousands of black lines, boxes, it looks like crap. I don't see those tiny squares it at 4-5 feet back on my 42 inch hdtv.