I will admit, Four Corners is there strictly for the novelty of it. If not for arbitrary lines on a map, it would hold no significance whatsoever.
Basically, if you're passing through the area, it's a neat tourist trap, but not worth going out of your way for, to me. (I went up US550 from Albuquerque, so it was on a few miles extra from Teec Nos Pos to hit it).
Sykotyk