If you look at stats for participation in sports most of them are down. If you look at viewers for pro sports they are down across the board including the NFL (which was once thought to be invincible.) Young folks don't like casino gambling, snow skiing, riding motorcycles and the list goes on. The reality is that most of the younger generation prefer to stay home play video games and watch netflix. They like instant gratification and shy away from games with a steep learning curve. They also shy away from face to face activities: dance clubs, live entertainment venues and dive bars are closing because as the boomers are aging out the younger crowd is not taking their place. I don't think pool will go extinct but I do believe it will be nothing more than a bar room and sports bar/grille activity. It's a small niche and will remain so.