I think many use Slot machine tracking systems: These systems allow casinos to track the performance of their slot machines and determine which games are most popular with players. This information can be used to optimize the casino's gaming floor to attract more players. Also Virtual reality and augmented reality like Some casinos are experimenting with virtual reality and augmented reality technology to enhance the gaming experience for their guests. This technology can be used to provide immersive game environments and add new features to existing games.