Slot machines used to fill entire casino floors with massive cabinets over 40...

https://blogfreely.net/teresa-long85/what-is-mrq-casino-and-does-it-have-mobile-slots

Slot machines used to fill entire casino floors with massive cabinets over 40 inches tall. Today, much of that action fits comfortably on a 6-inch phone screen. This shift means you can spin classic reels anywhere without a trip to the casino