dvdmike said:

Of Blade Runner there were only blow ups, no 70mm prints.

It seems important to you that those terms are mutually exclusive. They aren't. For the record, I am well aware that Blade Runner was shot on 35mm. Nonetheless, the 'workprint' accidentally screened in 1990 (as part of a 70mm film festival, no less) was indeed a. 70mm. Print.

And the work print is a direct scan of a film print and will be better looking than the LD due to the colour space

Countless preservation efforts on these forums have demonstrated that that is far from the case.