Create a slideshow add-on that can be inserted with a button "Add Slideshow" - just like we "Add text" or "Add image" to a project/page.
The Slideshow should use simple images (maybe with captions) and projects, so one can build a homepage with a slideshow of latest projects and when a visitor clicks a slide will go directly to that project.
And this would be the final feature for a great folio theme :D
p.s. you're doing a great job with this theme Armin!