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Very, very well talk. Explained the concept of WebSockets while powering his entire presentation with them. But the most impressive thing was the balance of getting into the details without losing the audience. This is the first WebSockets presentation I've attended where I really understood the different tools and how to really use them in a project.

I thought using WebSockets to control the presentation on the attendees' laptops was a really impressive way to show the power of the technology. It was also good to see the tie-in back to the React presentation, showing how they work together. I also appreciated hearing about the graceful fallback when WebSockets aren't available, and the pros/cons of those fallbacks.