I love some of these building ideas. I may try to replicate some of them in Blender. Got to get my hand in. The big dome doesn't excite me so much but, hey!
I like the idea of lots of marble, cracks and all. The structure may well be dull metal underneath, but one of the advantages of high tech is the ability to build more for aesthetics than raw structural necessity. In the 30's Bauhaus may have looked cool, now it looks like a parking garage or an old Soviet apartment building.