Honestly I cannot think of a mobile application that would levereage 25% of that. Maybe Google Earth 3D with GBs of data preloaded?
For me, it's RAW photo capture and editing. Photo libraries these days are already large, but imagine thousands of RAW photos that you'd have to load all at once. But it can also be as simple as faster boot and application launch times, especially if the app you're using has a lot of assets.