But the UK is not the US. Just because something is popular over there, doesn't mean it should/will be popular here.
Also, the interest in snooker has been declining for some time now.
Agreed, but it does refute the idea that pool can't be a mainstream sport because it's "boring". If cue sports were too boring to be a spectator sport, then snooker wouldn't have made it either.
The UK has a tradition of pro snooker, and pool does not. That's one big difference. If pool's gonna get there, that tradition has to be built, and imo it will have to be ground up. Overnight reality-show gimmicks aren't going to do it.
Another problem is that snooker is more watchable than 9-ball, at least with the current rules where it's mostly a break contest.