Make the middle zipper pocket to a laptop bag. The bag holder sewed longer to the the bottom of the bag. 2 main zipper pocket, large capacity for your everyday storage. Canvas casual large capacity handbag, suitable for most occasions.
An interesting 'accordion' dress concept I saw on a Chinese dress site people might be interested in (link to dress in comments) : sewing. It would be interesting to not too a bunch of colors for the accordion part, but just one.