Slot machines used to fill floors with cabinets more than 40 inches tall and 50...

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

Slot machines used to fill floors with cabinets more than 40 inches tall and 50 feet wide in some arcade setups. Now, you can play those same games on phone screens just 6-7 inches across