All in favour of the science and I'm sure there will be much to learn from these massively parallel endeavours.
That said, there are at least two glaringly suspect assumptions here:
1. That because the human brain works with a lot happening in parallel, a computer must do so to the same level. This ignores the fact that silicon and the qubits that will eventually arrive on the scene have matchless power and many strengths that the squishy grey jelly simply does not. One reason the brain works with such parallelism is because it cannot clock at, say, 5 GHz. Jelly cannot do it. Silicon can. Insofar as the brain's parallelism is a compensation for its many other weaknesses, it is unwise to become too obsessed with parallelism for its own sake. This runs the risk of learning the wrong lessons from the human brain and can easily become a blind alley.
2. That the animal brain is something we should faithfully emulate ... but why? Animal brains are evolved, not designed, and include a great many of the errors, inefficiencies, redundancies and circuitously superfluous kludges that evolution produces because it does not and cannot think ahead. You wouldn't design a robo-giraffe with a wasted length of neural wiring its neck, as evolution caused to happen: you'd think ahead, *design*, and do it better. The human brain is shockingly easy to deceive and manipulate, constantly forgets and makes mistakes, is quite capable of holding beliefs contradicted by objective fact and rationality: what's the point of including all the weaknesses and bad stuff? Why try to replicate the human multiple-reinforced-connections way of storing memories (which gradually summarises, simplifies, erodes and sometimes completely fictionalises them) when technology can put ever-tinier terabytes of RAM and petabytes of storage in your hands, to be managed by software that will store far more data more accurately than a person ever could?
If you do succeed in creating something with the processing power and *processing style* of a human brain, it will have to have emotions: fear, hunger and lust being near the top of the list, since they keep an organism alive and provide it with motivation. Without feeling, you have a computer, not a mind. Even assuming you can implement this in a non-organic substrate, and even assuming that this is not merely a software emulation of those feelings (therefore, still a computer), what do you do next? Answer: you're either a son of a bitch who's imprisoning an innocent child, or you spend the next 20 years getting stuck in an ethical thicket, because you've created a consciousness, something which probably ought to have freedom and citizenship and agency ... and the latter will be definition include the capacity to decide to do harm or good.
In sum, attempting to build a truly human brain is probably impossible and almost certainly horribly unwise. Yes, by all means let's continue creating awesomely powerful computing devices, they may be our salvation. But where brain and mind is concerned, the ambition is in more than one way quite doomed.
(And yes, I am purposely conflating brain and mind in this comment, which in this context is not necessarily a reductive fallacy.)