Good example. Also if you watch 'The Good The Bad and The Ugly' in full screen on a TV you will probnably see the good...very little of the bad and virtually none of the ugly.
Just flip to CNN and see a whole bunch of Ugly!
Most Spielberg films are ruined by pan and scan too: Jaws, Close Encounters, Raiders, Schindler, Private Ryan...all would be deeply scarred by pan and scan.
If you're a Star Trek fan, get a copy of the director's version of ST 4. It has a special feature where Leonard Nimoy (the director) demonstrates the difference between the two formats, using the scene where Kirk, Spock and the whale biologist (played by Catherine Hicks) are in her pickup truck.
I love the widescreen format and buy all my movies in it, but my parents can't stand it - they hate the bars on the TV screen. It's just a matter of preference.