Slot machines used to take up entire casino floors with cabinets over 50 inches...

https://wiki-zine.win/index.php/How_Did_Slot_Machines_Go_from_Furniture_to_Software%3F

Slot machines used to take up entire casino floors with cabinets over 50 inches tall. Now, these games have shrunk to fit comfortably on phone screens just 6 inches wide