I agree with those who feel that 10-ball is a better competitive format for upper level players. The problem, when we talk about replacing 9-ball, is not about testing competitive play. It's about marketability. After all, I believe that anyone would agree that straights is a better (perhaps the best) game for gauging who is actually playing better, particularly among the highest level players. Why did it give way to 9-ball? We all know the answer. Except for the knowledgeable fan, straight pool was boring to watch!
If we apply this logic to the dynamic between 10-ball and 9-ball, I believe that 10-ball will eventually take hold as the main game in Europe or Asia because of the obviously larger base of interested and knowledgeable TV viewers. For the public stateside, I don't believe that less runouts and more safety battles will stimulate TV viewership, and thus I can't see where the financial support will be for 10-ball in the United States. However, inasmuch as America's participation and importance in the sport continues to decline, in the next 5-10 years the preferences of the American viewing public might not really matter. The main media markets for the game are already overseas.