Mr. B wrote:
Out of curiosity, do 70mm blow up prints look better than standard 35mm?
No, they look two to four times grainier, but you trade that for image size.
70mm blowups often suck visually (TUC had some prints that were almost unwatchable -- I know, I had to try to watch one), but they do have a much better soundtrack because 5 whole mm were allocated for it.
If you've seen a wellshot flick that was originated on 65mm movie as opposed to a 35 blowup, the difference is ... so far beyond huge.