Right, my reference to the fact that we still use flat CPU's is in part referring to the transistor count. Also you are referring to a commercial mass-produced

Right, my reference to the fact that we still use flat CPU's is in part referring to the transistor count. Also you are referring to a commercial mass-produced CPU that debuted at $4200 nearly three years ago - and was considered overly expensive at that price.[1] And you're comparing this tiny single package to the human brain directly, not even multiplying by a farm of them, which would be more than reasonable if we knew what we were trying to emulate. The issue, as you state, is that we don't really know what's going on. However there is no reason to assume a fundamental barrier to continued innovation as we learn more and more, and computers can do more and more. [1] http://www.dailytech.com/Intel+Airs+10Core+Xeon+Server+Chips+at+Insanely+High+Prices/article21311.htm http://www.dailytech.com/Intel+Airs+10Core+Xeon+Server+Chips...