As the other commenters have pointed out already, it seems to be a permissioned blockchain if anything, exactly what Schneier describes as already having existed for decades, nothing new, just marketing.
In particular it's not about having many trusted participants, it's about being public without any trust (from the blog post: "This ledger is public, meaning that anyone can read it").
Again, I never said "blockchain is here to stay"-- just distributed ledgers. And, yes, distributed ledgers have existed forever, but their use by market participants at arm's length is new, as are many new tools we can use to build useful distributed ledgers (including blockchains!).
In particular it's not about having many trusted participants, it's about being public without any trust (from the blog post: "This ledger is public, meaning that anyone can read it").