IMHO, AI will exceed human capability by degrading human capability. It won't really exceed a 2020 person, but a 2030 or 2040 person will be less capable due to AI dependence.
That should mean that we can focus the freed up brain power at getting better at things we still need to do.
Time will tell!
It's even worse than that: calculators can actually make higher level math more difficult (at least for me). I never developed strong manual arithmetic skills because I was a huge pro-calculator partisan in elementary school. When I got to college I really struggled with calculus, because manipulating equations requires arithmetic and that meant I had extra mental workload to operate the calculator.