Slot machines used to fill casino floors with massive cabinets over 40 inches...

https://www.play-bookmarks.win/slot-machines-used-to-be-massive-often-with-screens-over-40-inches-and-heavy

Slot machines used to fill casino floors with massive cabinets over 40 inches wide. Now, they’ve shrunk down to fit in your pocket on screens as small as 6 inches