Hal 9000 said:

Huh. That's really amazing; it seems very counterintuitive that adding noise to the video would improve its look and seemingly bring out detail.

Does it really bring out detail, or is it just our perception? That's a serious question; it looks that great.

Let me put on my dunce hat and ask a stupid question. Wouldn't 35mm grain be more authentic for the OT than 70mm, even if 70mm looks better?

Technically yes, but I really want to make the OT shine a bit more, plus I'm not making it with little grain. It's still grainy (grainier than the Bluray's), but it's with a really fine grain, something too fine for 35mm.

And yes, there is actually more detail there, the grain just helps to fill in and remove any digital artifacts.