The power of apps is basically due to the high ROI, not just in financial terms. Most apps are easy to use, cost little to nothing and do the job you want it to do. If you don't like it, or have no longer a use of it, fine discard it.
But without realizing it, we are changing the way we think and act. The Apps will have very profound and deep impact on how we go about things in every aspect of life.