I thinks this type of paradigm shift is what will be needed for the next level of performance for AI. But it also seems like for that to be competitive with current methods, they need to reduce the size by a factor of 2-3 and also make bigger chips. I just feel like IBM has a track record recently of doing great research but not actually manufacturing anything. Kind of like Google.
Just a laymen here, but if the organic brain is something we're trying to model I always ached for some kind of analog processor for things like neural networks. Op-amps, not logic gates. (Quick google found this fun hobbyist article of a perceptron built with op-amps: https://www.nutsvolts.com/magazine/article/the_perceptron_ci... )
While there is a bunch of research for modeling organic brains, IMHO it is primarily driven by neuroscience trying to understand how humans work, and not directly applicable to making computation more efficient.