"The problem is that our brains are pretty specific in the types of problems they're adapted to solving"

Brain in fact can adapt it's physic coprocesor to solve many problems it was not originaly intended to solve - see extreme sports, arcade games, steering vehicles, playing live music (and imrpovising it).

I think we could perform many task currently thought to be too computation intesive for human, if there was some clever interface, allowing us to use our coprocessor to solve it.

Like somehow translating problem of controlling induction motor into problem of keeping balance on the bicycle :)