That's great, but it means it'll always be a userland library rather than a OS supported networking protocol... which means the API will never be a defacto standard akin to the BSD sockets API. The reference implementation is also in obtuse looking C++... which will hinder bindings to other languages.

In short, don't expect to see this outside of Android or Chrome.

On the plus side, this is exactly what UDP was for in the first place.