"it was that the things on the screen behaved fluidly when you manipulated them, without lag, allowing you to use the interface _while forgetting that there was

"it was that the things on the screen behaved fluidly when you manipulated them, without lag, allowing you to use the interface _while forgetting that there was an interface there in the first place_." This. Playing solitaire by easily flicking the cards away was magic back then.