The real equivalent is something like Stockfish, AlphaZero, etc. that performs at superhuman level across _all_ domains. It is something that beats any human at any competitive activity. Arguably, super human intelligence exists already in the form of corporations, institutions, and state actors. Organized collectives of humans augmented by computers are obviously more capable than any individual across domains. “Country of geniuses in a datacenter” is simple enough to get the idea across, but something more like “company in a datacenter” or “state actor in a data center” might be more useful terminology for describing relative capabilities.