If decent source materials exist, there is no good reason why a 3D BD version of classic 1950's or 1980's 3D films couldn't be released and look terrific in a modern digital theater or on a 3D TV. At this point, it would behoove the studios to see what materials they have available, if for no other reason than to extend the catalog of 3D BD's on the market. I think the main argument against such a thing happening for most of the films is that many of them just aren't good films. There are exceptions, of course, such as the aforementioned HOUSE OF WAX, DIAL "M" FOR MURDER, and KISS ME KATE. Even those films would only appeal to classic film buffs, sadly. I don't know that the expense of creating a new 3D master would be worth it for the studios. As for me, I'd love to be able to see 3D re-releases of classic films in the theaters. I'd go in a heartbeat. Sadly, I doubt it will happen.