Horace Dediu thinking through on what it means to be great:
This quandary came to mind when looking at the performance of the latest iPhone, the 6S. Observing it closely, we lose sight of it. We see only minute changes between versions; marginal changes which can’t be weighed. And yet these changes have a more important attribute: they are absorbable. A change that is ignored is not only valueless, it may actually destroy perception of value. It creates clutter and confusion. A change that is absorbable is valuable. It is meaningful.
Improvements which are not asked for but which change behavior suggest that the product is valued because it changes the buyer. I believe this is what causes us to pause and appreciate them. We feel we have been improved by the thing we bought though we did not ask to be made better by it. Collectively, multiplying by millions, the improvement we feel compels us to anoint the product as great.