They are intentional experiences with lights, sounds, colors, haptic feedbacks ("chair shaking" is a modern feature often big on the "features list"). It's a lo

They are intentional experiences with lights, sounds, colors, haptic feedbacks ("chair shaking" is a modern feature often big on the "features list"). It's a lot of the things that make a good pinball machine without the skill needed to play pinball for divergent evolutionary reasons (early slot machines were pinball machines and pachinko machines are still huge in Asia). The sensory overload lights up a lot of interesting parts of the brain all at once. It's like food science trying to meticulously create all those "super addictive foods" that hit salty/savory/sweet/umami/fatty taste buds all at once in wild combinations. Overwhelm the senses and tell people they are having an exciting time doing practically nothing.