Why Widescreen Is Better

Widescreen.org, surprisingly enough, has an flash example of why widescreen TVs are better then 4:3 TVs. To a certain degree I agree with it. Going more to the root of this, it seems to me that there would be more interesting things to view to the left and right as opposed to up and down. Perhaps we need an adjustable ratio depending on the scene?

See The Flash Demo: