DVD's do not use sequential access VHS did.
VHS quality rapidly detoriated, cared for properly DVD does not.
DVD's allowed menus and additional features to be layered into the film, VHS did not.
DVD's are small and light, VHS was big and heavy.
Haven't you heard of the law of diminishing returns?
it depends on where you start.... anyway, then why do you even have a HD set?
I really don't want to argue but I just find the difference between bluray and up scaled DVD so different that I just can't see how anybody can dismiss it so.