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

https://celebmeadow.com/from-floor-standing-machines-to-pocket-screens-the-shrinking-footprint-of-slot-games/

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