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

https://wiki-spirit.win/index.php/Why_Do_Slot_Machines_Take_Up_So_Much_Floor_Space%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