It's a matter of personal taste, while some people may dislike it, I find underwater reproductions of terrestrial landscapes to be quite beautiful and fanciful.
I've seen that series of images before, but it was on a spanish(I think) site and I couldn't make heads or tales of what it was describing. I would like to try this one day in a nano, but it would definately be a high matinence 'show' setup. You would probably only be able to run it without a filter, since any kind of current would blow the falling sand around everywhere.
Take alot of photos when you're building this, please!
Wabi Kusa is just an Aquascape Katamari