Disruption is an outcome; you can only speculate what will be disrupted, whether it will be disrupted, and how; and that at first your idea will underperform everything else out there. It follows that what you start with is incremental—that is, not disruptive—and underachieving. And so, surprisingly, what you set yourself to build may not need to be better now than what already exists; it simply has to be worse today than what it will become tomorrow.
From the book, Innovating: A Doer’s Manifesto for Starting from a Hunch, Prototyping Problems, Scaling Up, and Learning to Be Productively Wrong by Luis Perez-Breva