This is a very simple example of how wiki content can have alternate outputs.
The concept was first based on S5, a early-day HTML slideshow engine.
It is nowadays powered by reveal.js
Simple HTML (or wiki)
You then just make your slides like you would a wiki page. Each <h2> (or the equivalent in wiki syntax or markdown) becomes a slide title and all the things under it are the slide body. The <h1> (or ! ) is the title of the presentation and things below it are part of the footer.