There is a theory I heared in presentation of Joshua Cooper Ramo at the Blockchain Valley Conference in Switzerland, Zuerich that things start decentralized but than tend to centralizes automatically in certain "cluster" nodes. The example he brought was the internet. It started decentralized but today the internet seems to be google, amazon, facebook & co. So not so decentralized as you might think.
I wonder if we will experience something similar regarding blockchains.
Those are more like masternodes.
You are right - that is a good comparison which I haven't thought of.
Very interesting. I wonder if one can use biomimicry aid distributed networks.