Would we be able to have a "digital human" when we reach the level of creating this kind of brain mapping for the human brain?

Honestly I think we're still discovering how powerful neural networks are and certainly they can do computations that sound very close to intelligence in some contexts, but I still find it hard to think that we can simplify the whole reality of an incredibly complex chemical machinery down to a bunch of matrices multiplications.

> bunch of matrices multiplications

What these matrix multiplications are doing is approximately solving pretty high order differential equations.

The approximation is not very analog, sure. But neither is nature.