small piece of feedback on the presentation: "Schema based serialization made easy" is a lot better than "a rival to protobuf", especially if there are many ways in which it is not a rival to protobuf
I think the other slogan is better because it mentions what you try to do differently from protobuf, which is your selling point against protobuf (which has wider support, more language bindings, ... and thus is hard to compete with on the basis of just "we do the same")