What I find truly remarkable about polymaths is that they don't seem to be crippled in other regards. There is no trade-off. Actually, abilities seem to positivly correlate rather than displace each other.
It seems like there's a free lunch somewhere. Which is unusual for living beings, for evolution to miss it.
Niels Bohr - Nobel Prie winner, Quantum THeoretician, Olympic athlete.
I think you might be onto something - I suspect its that genius is not genetic, which indicates it might be nurture not nature - which means things might be really cool for humans in a hundred years.
It seems like there's a free lunch somewhere. Which is unusual for living beings, for evolution to miss it.