Nick Sullivan and I gave a talk about TLS 1.3 at 33c3, the latest Chaos Communication Congress. Here's the Fahrplan entry.
We spoke about the flow of TLS 1.2 vs. TLS 1.3, how it manages to save a round trip, resumption and 0-RTT, forward secrecy and replays, all the things that were removed, all the things that were made more robust, and finally about the history and implementation of the spec.