What are the differences between using a presentation in PowerPoint Online and in PowerPoint desktop?

Microsoft provides a list of feature and function differences between the PowerPoint Online and PowerPoint desktop here:

https://support.office.com/en-us/article/Differences-between-using-a-presentation-in-the-browser-and-in-PowerPoint-8dff31ff-3a68-4670-9915-49d51b7d3113