A CRDT is any data structure that meets the definition (associative, commutative, idempotent, etc...)

Event Sourcing is not strictly designed to achieve eventual consistency in the face of concurrent writes though. But that doesn't mean it can't be!

I've also been considering an intent based CRDT system for a while now (looking forward to checking out GPs link) and agree that it looks/sounds very much like Event Sourcing. It's worth while being clear on the definition/difference between the two though!