The info screen shows the incoming signal, not what's on the screen. The fact that you've got 720 x 480 also indicates that you haven't set up the DVD player to upconvert the signal properly since you would want to be seeing 1080P as the upconverted format I assume.
Thanks-a-ton for your suggestions and the useful links.
You were right. I managed to activate 1080p on the samsung bd upconverter. I noticed that when I played SD discs 60zh was on and when I played BD discs (i.e., Planet Earth) 24hz was on, the info screen. I'm assuming this is the way things should play. Not sure if 120hz should show, since our new samsung lcd a650 has 120hz??