Regarding the release of the unaltered versions, I think an upscaled fan preservation is going to be the best thing we're ever going to get unfortunately. Didn't Lowry say that the original prints were in bad shape numerous times? I'd doubt Disney would go out of their way to obtain better prints to work from and scan, especially if they feel the cost of doing this outweighs the benefit of $$$ return. Also, I doubt Kathleen Kennedy would authorise such a move, as it would undermine George's vision of Star Wars which we all know is now the "Special Edition" versions.
As much as I would love this to happen, I just don't see it ever happening. It would be some miracle if it ever did though. Sigh.