LegendaryPOO said:

Surely with the few million it would take to remaster the theatrical versions

I don't even think it would cost that much. Especially EMPIRE and JEDI, both of which had a fraction of the theatrical run that the first movie did, and can be no more difficult than any other early 80s hit, like Firefox or Trading Places. As for Star Wars, maybe as a base we can look to Don May, who wants to do an ultimate blu-ray transfer of Night of the Living Dead and says he needs 350 thousand to do it.