My wife and I decided to stay at the Waldorf to experience it before its closure. She had stayed there as a college student on her way to a European tour and I spent a few nights there in the late 1970s while on a business trip.
Below are some photos I took of present details. I suppose most of these will be preserved, but don't know for sure.
As you probably noticed, the Waldorf-Astoria is an example of Art Deco architecture and ornamentation. Very little of the geometric kind of Art Deco here, but more of the "organic" style seen in the 1925 Paris Exposition Internationale des Arts Décoratifs et Industriels Modernes (Wikipedia entry here), which had its roots in Art Nouveau.