But we weren't talking about things being twice as fast, we were talking about twice as many neurons (remember, we were talking about squishing BRAINS together, not speeding up processors), which, all other things (such as synapse numbers) being equal, scales logarithmically or exponentially, not linearly, as you seemed to imply. This means that it keeps up with problems that scale the same way just fine.
" In fact right now we are not making computers faster at all. We are just making more of them in the same space."
In the business, we call that "a distinction without a difference". And besides, clock speeds aren't the problem here. The problem is finding a way to reproduce neuronal connectivity and function.
"And again 2 computers does not mean twice as fast, twice as much input processing or anything."
Tell that to the people assembling and selling botnets for $millions. Or BOINC for that matter.