A lot of poker game tournaments have been announced on this board over time, and am I kind of wondering what makes poker games so inclined to the tournament and we don't see such competitions being announced for other games?
Short: Poker is one of the few (if not only) gambling where skill can prevail.
Better reward people for their skill than luck
I cannot think of any other casino game where it can compete with Poker in terms of skill and endurance, it takes years of effort for you to sit and try to employ a strategy where your opponents cannot decipher what's on your card and for you to study the body movements and facial expression of your opponents, it's very similar to a chess game where the battle is on level of skill and trying to combat what your opponents next move, that is why I prefer playing a luck based game like Dice than poker, even though poker is more rewarding.