The use of powerful wallpaper and limited tile
too overdone, but the idea of ultra elegance with white marble
Use of stone half-way up with a strong color
Use of interesting with the plain
use of mirroe & wainscotting to minimize area of expensive wallpaper/mosiac, etc..
The use of one feature wall, then paint
Use of stone wainscott, then ornate mosaic above. I like the elegance of this, but not the "gilded" look
Use of multi faceted surfaces