I just based this on the Amazon website.
Yup, that's a careless error on Amazon's part, since the films were all shot in a 1.85:1 ratio.
You know, what I've seen at Astrovision are copies of the trilogy in a box similar to the R1/R2 Coppola restoration (featuring the signature of Coppola) but
without the words "The Coppola Restoration" printed under the film's title. This makes me think these sets contain just the old editions placed in a new box. I could be wrong, but owning both the original R3 boxed set and the R2 Coppola Restoration (as well as The Limited Edition Godfather Trilogy chronologically reedited LaserDisc), I'm not really willing to check out this "new" set.
Edited to add: There, I see Dan & I have the same idea on this R3 set.