DVDs that fill a 4x3 tv are called fullscreen. But since more and more homes have 16x9, that title doesn't make sense anymore. Fullscreen DVDs don't "fill" the screen of your fancy plasma tv. Yet DVDs still come out now dubbed fullscreen.
A better title would be 4x3, with a little boxy graphic to illustrate the aspect ratio, though the video snob in me is tempted to dub them "not widescreen" or "visually truncated."