Quote from article:
"It takes about 20 transistors to implement a synapse. Clearly, building the silicon equivalent of 220 trillion synapses is not an easy problem to solve."
-- That's nice if you want to model the entire brain but why would you? How much of the brain is geared toward bodily functions that one would not necessarily need to model? If you exclude the required synapses dedicated to those functions you can focus on a smaller subset that would be easier to build and operate...no?
Another thought is when building a brain model...who's? Not all brains are built equal...almost every brain related health story I read online speaks of neurological issues in the brain...what are the odds of building these into any model of a brain? It can get expensive correcting the circuitry to improve and correct these? Which leads me to wonder...what does a flawless brain look like exactly?