I have a widescreen TV, and I really don't like watching cropped movies on it. It just looks bad, and it feels wrong.
Watching a non-anamorphic movie on a Widescreen TV is like watching a drive-thru movie from your rooftop with binoculars. Sure, you can see the film, but it kinda looks like shit.
Plus, the documentary on the Top Gun DVD is pretty good.