Just got this idea -- haven't researched it.
An ethereum app that automatically (more or less) captures your word processing, photos, spreadsheets, etc., hashes them, and then uses the hashes to create bitcoin addresses. This could be useful for writers, photographers, scientists, and anyone else who wants to establish an infallible public record of their data ownership/possession on a just-in-case basis. The idea is that the process would run in the background (for photos), or be started if desired by a keystroke combination when word processing.
Seems like it might be feasible.