[p1esk]

There have been dozens of analog neuromorphic chips built in the last 30 years. Latest ones use floating gate transistors for synapses. Memristors, in theory, are better devices that flash memory (faster, lower power, more dense), however that's just in theory. In practice, they are very hard to scale. This crossbar is 12x12. No one knows how to build anything much larger than that, on a mass scale.