A DVD won't give you HD but it will give you additional resolution when used with component video cables although you may need to configure your DVD for 480 output (480 lines of resolution versus the 340 for normal TV). Also you need the component video in order to take advantage of the progressive scan feature (although I do not know what progressive scan does, but I had to have it). HDTV provides 1080 lines of resolution which is significantly higher.