I think you are missing his point about the computer industry. If you wait, you can buy a better computer for the same amount of money as you would originally have. Alternatively, you could buy the same computer for less money. This is the equivalent of your money going up in value (as in you have more buying power). His argument is that if we use the author's logic, people would want to wait to get a new computer instead of buying one now. This is obviously not the case and so his argument is flawed. I agree with the poster and disagree with the author; the poster found the perfect analogy.