In reply to:
For DVD, unless your TV is inherently digital (plasma, LCD, etc), I don't believe you'll see a difference. At that point, the only advantage would be transporting the information digitally so that the end product has a pure source. At 480p, I doubt enough degradation can occur in component to make a difference.
Today's TVs and RPTVs often process video signals digitally even though the final imaging device is analog (CRT). So there is theoretical and practical advantage in feeding them digitally.
Also, many people, at the very least those with front projectors, seem to attest that DVI-D connection does improve the DVD picture quality over component connection, often quite dramatically (although I haven't yet tried DVI myself).
