depends on the aspec ratio of the original. The TV shows aspec ratio is pretty much designed for 16x9 tvs thats why you get no black bars. movies like Star wars that are 2.35:1 have the bigest black bars cas that is not a 16x9 ratio. Then theres the movies in 1.85:1. It all depends on the aspect ratio of the content you are watching.

this should help

http://www.thedigitalbits.com/articles/anamorphic/aspectratios/widescreenorama.html

and this on animorphic transfers

http://www.thedigitalbits.com/articles/anamorphic/index.html