Also keep in mind when I talk about "dirt" I mean physical scratches and well...dirt on the film. Now apparently the blu-rays (like I said I havent actually seen the blu-rays yet) may have scrubbed a little TOO much grain off which is kinda lame. But originally I simply meant scratches etc. Just so we're also clear on that.

As for the perspective of someone my age. I see the cgi as sort of a travesty.
Compare the movie to a beatles song. Changing the color pallete is somewhat equal to doing a remaster. Some people will like it, some won't. But overall it's stil the same song. Just with a "different" feel to it. What George Lucas is doing however, is more comparable to John Lennon deciding Yoko Ono was also part of the band, and permanently mixing her voice into the song.