I haven't read the book, but from my experience I have found that truly new ideas/products are much harder to explain (I have tried a couple). If someone is already using a competing or similar product then you can say it is like X but here is how we are different/better. If you are the first mover, then you have to explain what X is, why X is useful, and why they should pay for X. Being a first mover is also riskier because there isn't proof that there is a market yet.