Criterion putting out Wall-E is notable because it’s Criterion’s first Disney release in years and their very first Disney title on 4k UHD.
It’s also notable because their new edition will have Dolby Vision whereas the Disney disc didn’t. Even the Star Wars UHD’s didn’t get dolby vision on disc. TLJ’s original 2018 release did, but it’s one of only two movies where Disney included DV (Black Panther is the other one).
I think the big difference here though is that Wall-E is just one standalone movie and not part of a bigger franchise. It would be fun if Criterion also got the rights to Ratatouille and Up because then they could put out the Pixar Art House Trilogy.
If Disney were smart, they’d keep Star Wars all to themselves and give each film its own multi-disc, multi-version collector’s edition (complete with dolby vision). I really don’t see them licensing out Star Wars, ever, although I’d love to be wrong.