The main difference between event sourcing and datomic are the indexes and the "schema", which provides full SQL-like relational query powers out of the box, as well as point-in-time snapshots for every "event" (transactions of facts).
So, "events" in Datomic are structured and Datomic uses them to give you query powers, they're not opaque blobs of data.
So, "events" in Datomic are structured and Datomic uses them to give you query powers, they're not opaque blobs of data.