I like Duane's comment about the engine. "Silicon is nearing that wall. What's out jet engine?" I thought the cognitive computer chip was interesting emulating neurons, synapses, dendrites, and axons in the brain's neural networks using special-purpose silicon circuitry." It's stil silicon though.
'Corelets' Prime Cognitive http://www.eetimes.com/document.asp?doc_id=1319173