Some are saying this is no where near the amount of processing the human brain has. But, it doesn't seem we need that much of the brain. There are plenty of stories of highly functional and talented individuals with almost no brain, and this machine would probably be in their ballpark.
I mean, a lot of the brain is devoted to sensation, so if you don't care about simulating how the brain interprets certain aspects of sensation (motion, depth, vision more generally) you could probably simulate other functions. For memory, however, at least, there's a lot of evidence that you'll need to simulate sensory systems to be able to accurately simulate recall [0].
