I use HTML for my presentations and publish them online mentioning the URL at the top, such that people can open them on their device, which is often a smart phone. I take that into account for the interactive parts of the presentation.
Then could post it it when the clock advances by a second, shortly before the slide advances on the main screen. Aggressively poll it on the clients
to figure out how many ms after the whole second to poll.
All the screens would advance simultaneously which would impress the developers.
If someone in the audience has a question they can press a button to have their face and audio streamed to the big screen. Modified by LLM of course, or it would be pointless to have.
