What does digital transformation really mean?

We hear the term "digital transformation" all the time, and probably too often in my humble opinion. But what does it really mean and why does it appear to be a never-ending struggle that permeates our existence? Is it a task condemning us to repeat pushing a digital boulder up a mountain like Sisyphus, only to see it roll down and start all over again? Digital transformation is a term used by many and understood by few. So, in my usual manner (I am consistent if nothing else) I will also include another less used, but possible more descriptive term - digital disruption.