Slot machines used to fill casino floors with massive cabinets often over 50...

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

Slot machines used to fill casino floors with massive cabinets often over 50 feet tall in early designs. Now you can play those games on screens as small as 6 or 7 inches right in your pocket