Good article from USA Today comparing DVD to DVHS. The following is a quote from the writer.
I was amazed. Visually, D-Theater is not just an improvement over DVD. It leaves DVD in the dust, as difficult as that might be for DVD's growing legion of fans to visualize. The difference was so stunning that after watching the D-Theater versions of U-571, Terminator 2 and End of Days, the DVDs looked as if the lens had gone slightly out of focus.