I do. 46" XBR2 at 1080i (1920x1080) and I can see a large difference between all the settings. Especially in the background/smallish objects in that shot (like Will Smith's face. In 720p he's kinda recognizable. At 1080p he's in great contrast and you can make out the depth of his brow, his eyes, etc.). Admitadly the difference isn't as large as, say, between 480 and 720, but it is still there.