I think this is beautiful, I have a similar color scheme except my shower is marble slab and my cabinetry is a light grey with white walls. I also have wall mounted water faucets so there is no water on the marble counter tops.
The backsplash behind the oversize gas range is a luxurious focal point to this room! The large scale of the Calacatta marble is a good fit for this sprawling kitchen, and its pattern is highlighted through "bookmatching" (mirroring the pattern symmetrically).
I'm not generally a fan of wallpaper, but this is a perfect use of it. This space is a superior piece of design work.
Some great ideas here for an alcove sitting room off a master bedroom.
I've got to unglue my eyes from this and go to bed.