How well has the team articulated the potential need / problem of the PDD user / customer?
How likely is this user / customer going to adopt the proposed solution?
How unique is this solution either in its approach to fulfilling the need / addressing the problem, or in its execution of the idea?
How forward-thinking and creative is the use of technology?
Is the benefit to the user / customer clear?
How impactful is this solution in the life of the user / customer? (The solution could have a big impact on a small group of people; or a small impact on a big population.)