Dynamic table of contents based on sections
The idea is pretty simple and - I think - useful: auto-generate table of contents (ToC) based on the name of each section in PowerPoint.
For example, you have three sections: introduction, sample projects, and further reading. The aut-ToC would allow you to insert a ToC including the names of each section, and e.g. the number of the first slide in that section (1,8,15), and potentially other info (e.g. number of slides in that section). As you add/remove/change the sections and their names, the ToC would adjust automatically.
There would be different lay-outs for the ToC, e.g. with bullets points, in table format, etc.