Slot machines used to fill entire walls with screens over 40 inches wide, heavy...

https://wiki-aero.win/index.php/Why_Do_Mobile_Slots_Need_Bigger_Buttons_Than_You_Expect%3F

Slot machines used to fill entire walls with screens over 40 inches wide, heavy cabinets, and flashing lights. Now, many games fit neatly on 6-inch phone screens, letting you spin reels anytime and anywhere