I presented TLS 1.3 to the CloudFlare London office. Why it's faster, how it works, why it's safer, what's clever about it.
The talk is recorded and comes with colored diagrams. There's a transcript on the CloudFlare blog.
Update: you might want to watch my 33c3 talk on the same topic instead.
An overview of TLS 1.3 and Q&A | CloudFlare Blog (archive) (video)