Slot machines used to fill casino floors with cabinets as big as 50 feet tall...

https://record-wiki.win/index.php/What_Happens_to_Slot_Game_Controls_When_You_Rotate_Your_Phone%3F

Slot machines used to fill casino floors with cabinets as big as 50 feet tall or giant 40-inch screens. Today, these games fit in your pocket on phone screens just 6-7 inches wide