What happened to that?
Given the expense of the latest AI chips, or just the RAM for them, the price of land, cooling and power is not top of the expenses bill, so all talk of sea-based or space-based data centres has to be regarded as having jumped the shark.
As of yet I have not seen the use of server racks as structural architectural features. They always seem to need a vast shed that has its own supports, when server racks could also be the walls and supports for much of the building, or some other structure, maybe a road bridge.