I did faced this scenario a couple time when working on application that would work offline, a few of those I was involved in:

- try to reduce the amount of paper based catalog we were sending out to customers, those were a couple thousands of pages and not cheap to produce, not cheap to send and would get deprecated very quickly. The web app would be pulling the entire catalog at first load so customers could go in remote location and still be able to use the catalog

- a web app for sales that was intended to be use on customer site containing all the marketing materials and much more during presentations on site without ever having to connect anywhere