It's less a feature, than an annoying bug on certain displays. Whenever a progressive signal is sent from a playback device, it locks the screen modes so I can't use the zoom function on my TV to "zoom" non-16x9 DVDs. So I get the lower left image on this page on my TV: http://www.thedigitalbits.com/articles/anamorphic/anamorphic185demo.html and I can't zoom it. And using the zoom function on my DVD player leaves a "2X" icon on the screen all the time. I can turn off progressive scan on my DVD player for those titles so I can zoom them, but then the image isn't as good, so what's the point? This is basically why I told Lucas a couple of years ago he could take his laserdisc transfer original version DVDs and stick them where the twin suns of Tattoine don't shine. And BluRay is still a ways off for me. I've just yet to be convinced of the need for it, considering there's still so many problems with the titles (including the 4x3 transfers of the first season of the Dini/Timm Justice League animated series. Absolutely unforgivable). Edit to add: just to clarify this is why I got rid of my non 16x9 version of The Black Hole DVD.