Its not only that it is conceivable future gpts will have knowledge of all written text and skills of all domains. Imagine it knows all programming languages and all human languages, and it also knows everything thats ever been written. Imagine it can control robots and perform any work from lawyer to plumber. Imagine it can get perfect scores on IQ tests. That is superhuman. No human can attain beyond human performance in all professions and languages and be able to ace the tests for all professions.