Compare to topological optimization; it has a very characteristic style. Here it is just shape, but we could imagine materials microstructured like this, and then gaining surface finishes of a particular kind.

Diamondoid foams would be lighter and not as thermally conductive (a pure diamond building would be cold). Add a fractal trabecular structure, and there will also be texture. Since this is microscopic it would turn into optical, acoustic and tactile properties.

Suppose I want to make "diamond concrete" out of diamondoid. Blocks of pure diamond have obvious character and uses, perhaps with impurities for color. But homogeneity is boring.

There is still plenty of choice and arbitrariness here. But if one aims for utility and use a generative system of a certain kind, I bet that this family of materials would gain character like wood: recognizable, individual, variable.

There are many useful materials that look boring. Much of material beauty comes from selecting the families of material that are beautiful because of their intrinsic properties. So future beautiful materials may be more defined by generative styles and mechanisms.