Absolutely. If you look at the Phantom Menace today, the CGI looks like a bad video game. The "real" Star Wars trilogy aged fantastically; the stuff done as miniatures looks miles more convincing than the best CGI on offer in 1999.
I bet we'll get to "good enough" CGI someday given the amount of money and effort being dumped into it, but it might take a long time. The details are going to be the hardest part for sure.
I'd actually disagree with this. A lot of what is remembered about the first SW trilogy is sanitized a lot by the many re-releases Lucas has made over the years.
Off the top of my head, for example, in the original original trilogy, R2D2's color panels switched from blue to black on the shots where he was seen in space so as to not conflict with the chromakey color used to shoot the space background. I'd argue something like that is much worse than bad CGI: even though the shots looked plausible visually, it actually made me wonder if R2D2 was still on the ground and we were looking at a different R2 unit (or, in other words, actually injected some uncertainty into the story the filmmaker was attempting to tell).
I bet we'll get to "good enough" CGI someday given the amount of money and effort being dumped into it, but it might take a long time. The details are going to be the hardest part for sure.