I believe entrepreneurship is about always raising the bar. Today there are great apps but someone will learn from them and create something better.
I suggest breaking out of the paradigm of the app. I expect the way we interact with information is going to be increasingly tactile, preservable, and meaningful, moving us away from the medium of the application as on-the-spot source for of-the-moment input. As you consider how to keep yourself or your organization at the leading edge, it might be worthwhile to consult Donella Meadows' article "Leverage Points: Places to Intervene in a System".