Implement magic move
The ability to seamlessly animate objects from one slide to the next is one of the greatest features in Keynote.
I haven’t had a chance to look into reveal.js yet but I assume the data structure contains slide objects that contain the various elements on a slide. This could be implemented by giving ids to elements and, if the transition type is set to, for example “auto animate”, key properties of elements with the same id can be tweened (e.g., x position, y position, width, height, opacity, rotation).
Tyler Yates commented
Yes please! Adding this would put Slides ahead of all the other presentation tools.