So human beings won’t evolve fast within 20-50 years, without any genetic engineering.
As we are reaching our limits, it would be very hard to break any records – for those sports that measures speed, height, strength, etc.
But that is what we are all expecting (as audience) and what keeps the sports industry exciting and growing.
So those sports have become increasingly dependent on “outside helps” – including those (e.g. certain drugs) banned by the overseeing committee.
Therefore, there will be increasingly possible that future sports will be driven more by technology development and the supervising body will be more “tolerant”.
What is more, there is always a blurring line between “allowed medication” and “forbidden techniques”.
I will be very interested to see how this conflict/problem will be solved/mitigated.