Your brain can perceive the difference between a 25 foot tall figure and a 25 inch tall one even if the angular distance is the same. Just like you can tell the difference between a giant ant striding through your neighborhood and a tiny ant on the wall in front of your face. One is impressive, the other isn't.

It's a lot more complicated than distance from the screen. My brain is pretty good at telling the difference between a small screen up close and a big screen far away at the same "apparent size," due to binocular vision and the effect focal distance (of both our eyes and the camera) has on the end result.