The Global Gaming Expo is in its 15th year in Las Vegas.
But this year, things are a little different.
It turns out that people's tastes are changing. Organizers of the expo say that there has been a big shift towards skill-based games.
Those are games like poker, blackjack, Words With Friends, and video games.
People are still playing slot machines, but many are opting to leave less up to randomness and chance.
Skill-based games are very popular with the younger crowd, who are also into socializing. Gaming companies are recognizing this and make games that can be played with friends.