I've seen Pool go through several cycles in my lifetime. It runs good for a few years and then there is a decline. In the 60's (after The Hustler) Pool was huge in this country with thousands of new rooms opening up. That continued into the early 70's and then we hit a declining period. After the Color of Money came out in the 80's there was another surge in new upscale poolrooms. It lasted well into the 90's. We are currently in a downswing again, but the interesting thing is how popular pool became in China and some of the Middle Eastern countries.
There may be more poolrooms and people playing Pool in China then in the rest of the world combined. Last estimate I heard was well over 100 million players and tens of thousands of poolrooms all over China. The pendulum swings back and forth in the pool world, so no telling where we'll be ten years from now. I do know one thing. Pool is not going away! It's too great a game to disappear. Even in this electronic era people want to socialize and engage in physical activity. That's my take on things.