2030 - AI exceeds human intelligence in total?

So, what is meant by AI overpowers human intelligence summed up in 2030? I don't get it. If AI becomes logically far beyond human reach early 2027 so what's the puropose in combining human intelligence based of the 8 B + human population of the earth? Logical intelligence cannot be combined nor summed up,or? The individual with highest intelligence wins is the definition of human potential intelligence. How does Musk Math work?