Apps are Task-Completion Units.
Mark Watkins

The only exception I can think of are socials media apps, that, instead of completing a task, creates new social experiences. I still wonder if there’s an opening for these types of new experiences, i.e. Periscope, Meerkat and earlier, Secret. My gut is that the queens and kings of social media have already been crowned, and these new experiences will prove to be flashes of greatness instead of sustaining companies.