yes, the Panasonic TH-42PHD6UY has 4 modes, Normal, Full, Justified and Zoom.
a regular 4:3 aspect picture occupies an area in the middle with two side bars when run in Normal mode. you can run on justified/Full/zoom mode if you want the picture to strecth to the full screen.
But with 16:9 aspect pictures, the Normal mode should, to my understanding, display no sidebars, no top or bottom bars. Of course most movies arent 16:9 so if i have 2.35:1, it should still display with no sidebars and some top and bottom bars.
of course i may be missing something