"proof of unique identity" sounds really interesting, but I'd like to see how he'd go about doing that in a decentralized environment. Also don't be fooled to believe that will solve every problem we've previously been facing with alternate/faceless/anonymous/mass accounts. Whatever is going to be needed to verify someone will sooner or later be bought for less money than they'll eventually make with the platform. But it's interesting non the less and I'd really like to see what Steem could look like if upvote- and other bots wouldn't heavily skew what we get to see.