Slot machines used to be massive, some standing over 40 inches tall or spanning...

https://varimail.com/articles/what-is-responsive-design-in-a-mobile-slot-game/

Slot machines used to be massive, some standing over 40 inches tall or spanning up to 50 feet on a casino floor. Now, these games fit neatly on screens as small as 6 inches, right in your pocket