Slot machines used to be massive, with cabinets over 40 inches tall and packed...

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

Slot machines used to be massive, with cabinets over 40 inches tall and packed with buttons and lights. Today, all that fun fits neatly in a 6-inch pocket-size screen