You will instantly recognize the "techno-optimist." He or she throws around the words "blockchain, "artificial intelligence (AI) and VR (Virtual Reality)  at every opportunity. He and she, they, are the standard-bearers of a new world and their religion, their idolatry is technology and wealth. As this idolatry grows, after it is initially funded, it turns into enterprise; it has its day. Its day is short and the enterprise battlefield is littered with the bodies and debris of those who launched their frontal assault against the bulwarks of things as they are. As is the case in battle, victory favors the well-prepared, the well-informed. Like battlefields, those of enterprise must be surveyed, reconnoitered. The battle must be gone-over in our minds until we can visualize every step, every evolution. Battle is a crescendo of events which involves bringing appropriate weapons to the hinge point at the appropriate time. Its climax is what Napoleon called "l'attaque debordante," the discombobulating  attack. You call it the "killer app."