Mark, oh, yes, in the first pic I can make out the marble. I wasn't expecting that color base on the stand. I looked at the middle pic and it's neigh unto impossible to see the marble bases. It really is a perfect match with the carpeting, and it seems the can lights hit at the perfect angle to obscure them. Very unusual, but as you say, cool looking.
My guess is that these won't be the last speakers we see in that spot. Just a hunch. :)