I am quite confident that after my whitepaper is released, PoW is dead.
Research and interest will turn to my design as the future of "blockchain" consensus ordering.
The remaining need for PoW after my whitepaper is for an objective means of distribution of the initial money supply. But I also plan to introduce an improvement on Steem(it)'s onboarding distribution paradigm, which I argue is more objective than both of those.
Here is one of the many new technologies you will read about in my whitepaper: Proof-of-non-existence.
I am not joking. And I am not exaggerating nor a bullshitter. Sorry I wish I could release it today for critique, but the implementation is not yet ready. The whitepaper is basically done: 20,000 words, 300+ paragraphs, and 124 cited references thus far.
Sub-second (speed-of-light) instant "confirmations", unbounded scaling, no winner-take-all power vacuum centralization, ameniable to any form of transactions such as smart contracts and even user upgradable transactions without even a soft fork required, even transactions that never go on the blockchain yet are confirmed on the blockchain for the ultimate in privacy and censorship resistance, end of Gresham's law combining both a deflationary store-of-value with a currency, much better scaling, decentralization, resiliency attributes than Graphene DPoS (Steem), etc..
Basically the dream is upon us. The near to Holy Grail.
Kiss your Blockstream side-chains and Lightning Networks shitcoins goodbye.