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

https://www.acid-bookmarks.win/remember-when-slot-machines-took-up-over-40-inches-of-space-with-their-bulky

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