I got the Sharp DT-510 16:9 PJ about a week ago and was wondering how 16:9 PJ owners watch 4:3 SD TV on their PJs (if you do)?
I set my TV software to "letterbox" and that essentially "zooms" the image so that it takes the width of my 16:9 screen and chops off a top and bottom bar. I prefer this mode and most programs are already broadcast in 4:3 with the black bars so all that's happening is the back bars are getting cut off.
For programs that are really 4:3 I prefer this mode too as normally it's still ok, only once have I had someone with his head cut off the top.
SD source material is pretty nasty looking to begin with, so I imagine zooming in on that would look extra crappy. I would think most folks on this forum leave 4:3 as is, without zooming or stretching.