Slot machines once stood over 50 feet tall on casino floors, loaded with levers...

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

Slot machines once stood over 50 feet tall on casino floors, loaded with levers and flashing lights. Today, many fit neatly on phone screens just 6 to 7 inches wide