The visual hint of the next card behind the current one acts as a teaser. It rewards the user for completing the current action by promising new content immediately. It keeps the user in a "flow state"—the interface disappears, and the user feels they are manipulating the content directly, not the software.
So next time you swipe right on a pizza topping or a potential hire, remember: you’re not just making a choice. You’re taking part in a design language that turned indecision into a flick of the thumb. tinder like reveal