How can Ethereum systematically scale better?
You forgot to mention another scaling effort/idea, one which I think is the most important, not only to Ethereum but any blockchain:Blockchain Interoperability.It can even be the same protocol (Ethereum) or across different protocols (Bitcoin).Much of the enterprise world right now is throwing A LOT of development efforts at blockchain ideas, however they are all separated, private chains, they aren't just working on the Ethereum public chain (Homestead). However the development efforts of those companies will benefit the public chains, which is crucial.But I think at this point the idea of having a single public chain to rule over everyone is gone. The future will have millions of blockchains.. an internet of blockchains with some underlying protocols to transact across chains. This is where you will get your scale.Take the FaceBook example. What if the users of FaceBook, i.e. the FB clients, implemented a blockchain to support all functionality through FB (payments, sharing, likes, messages, etc.)? It would basically be away for users to control their own data, separate from the applications that use them (Own your data). But for brevity, this chain would just be the FB chain, which could interop with any number of chains if needed, but this chain would be scaled by the clients that use it. You could even have social verifiers to implement a POS (proof-of-stake) in this FB chain which could stake an asset of some sort on assuring things shared on the network are real (fake news). But that's off point.The whole idea of this new internet of blockchains is mostly about users having complete control/self-sovereignty over their data/individual. Many users won't even know that underlying the apps they use, their data and how they interact with other users is powered by the blockchain.Smart contracts, and all these thousands of tokens, in essence, given an underlying protocol that doesn't exist yet, will be the universal API that can connect everything in a trustless way.