Good points in Ivan's video about proof-of-work being a dead end, just look at the Bitcoin Cash mining hash wars going on right now, and proof-of-stake not being confidential, pointing out the necessity of an alternative consensus algorithm for the future of crypto.
That said there have been a lot of coins with made-up novelty consensus algorithms like proof-of-love, as well as permissioned, centralized ones such as proof-of-authority. It remains to be seen how effective DUSK's take on this will turn out in practice.
By the way, here is list of 29 consensus algorithms
https://hackernoon.com/consensuspedia-an-encyclopedia-of-29-consensus-algorithms-e9c4b4b7d08fI agree that PoW is dead end but right now it's the most secure one regarding Bitcoin. My favourite one is DPoS but it can end up like Lisk (dlegates' cartel owning the network) or EOS (more or less same as Lisk)