Gives you the same what? I cannot think of a single feature overlap. ZeroMQ has nothing to say about supervisors, binary stream pattern matching, inspection, static analysis etc. Erlang has nothing to say about reliable messaging, message brokers, fan-out, routing and other patterns enabled with ZeroMQ. Yes there is the word "socket" in the post.
Better yet: ZeroMQ is not even a language. What ZMQ does it lets your write extremely performant and reliable distributed systems in any language. It is a layer over sockets. Any complex system will have to interact with other complex systems, which are written in other languages. Say you develop a service and a lot of people want to use it. What API are you going to expose? One that is only based on Erlang primitives? Certainly not, because then you have limited your user-base to a small number of people.
