I agree with the points, but I'd take it from the other side.

1. The first and most important thing is to quickly explain the problem that you are solving and in a way that it catches the investor's attention.
2. Then, you need to show them that the opportunity (=market size) is big enough and that you have at least an idea how to get the customers.
3. Doing the above right will show that you are a competent person who understands business, problem as well as industry. Of course, if you are an employee #10 in Facebook, start with that. It will most likely catch the investor's attention better than anything else.