The short answer is: a lot of patience and perseverance!
More seriously, this is one of the most frustrating aspects of entrepreneurship. High-tech entrepreneurs are supposed to be innovators, but, even more, they are supposed to be visionaries. They have to see the value that a certain technology can bring into the market.
The naïve approach when one gets to a technological breakthrough is to think that a new product will succeed because it is better. In the head of the entrepreneur, the added value, the competitive advantages, and the future use of the product are already clear.