I have only watched The Phantom Menace so far (Yes I know, god I hate myself for starting with episode 1 first, but what can I say, I'm a bit weary of ANH lately and I felt like watching TPM to see how it holds up).

Picture quality on TPM is very inconsistent. Some shots are brilliantly sharp and high-resolution, some other shots are awful, and there's generally too much DNR making faces look waxy.

You can tell the two scenes that George shot with a prototype digital camera because there's an obvious drop in picture quality. It's the scenes where Qui-Gonn is taking a blood sample from Anakin, and when he's telling Anakin about midichlorians, right? Those bits look lower-resolution anyway. Other low-res shots include the extra podrace elements that George added from the deleted scenes back into the DVD. I honestly think some of those shots are standard-def blowups.

So overall, TPM is very patchy and I'd have to give it a low score for picture quality.

CG is also quite obviously poor. Closeups of Jar Jar and any other CG creature don't stand up well at all. But then you've got new Yoda who looks like 2005 quality!

The surprising thing is that I actually kind of enjoyed the film. Sorry. I've always had a strange fondness for TPM -- as long as you mentally edit out Jar Jar and the "Yippee"s while you watch -- and watching it on blu-ray was quite enjoyable.