It reminds of the amano style freshwater tanks. I think more and more people are settung up aquaria in this fashion. I think its a really nice change from the wall of rock you normally see, and as those corals mature its going to fill in really nicely. Most people wanna use every possible inch of real estate in there tank to pack in that one last frag or colony! I think it shows a lot of restraint to go with a sparse look like that and the result is stunning.