Yes...directors of that period wouldn't arbitrarily leave dead space at the tops and bottoms of the frames just in case it would some day be cropped to 16:9. In close-ups (of which there are many in most TV shows), you will lose the tops and bottoms of the characters' heads, e.g. It's interesting to watch the Babylon 5 DVDs. JMS was very forward-looking, and decreed that they should be shot open-matte (an aspect ratio between 4:3 and 16:9), and be framed so that it could be cropped a little one way for the regular broadcast, and a little the other way for eventual 16:9. Some directors got it, and some didn't. And you could always tell when they didn't very easily...chins and foreheads got cropped in the close-ups. Wow, sarcasm. THAT'S original!