All movies are displayed in 24 fps. They look smooth. Just because you think 60 FPS is absolutely necessary in action games that's more about reaction time and a point and click adventure game doesn't need that. No video on YouTube, fo example, is over 30FPS. Does all video look choppy to you?
And besides, skeletal animation for games inbetweens automatically so it'll look smooth even if it's rendered in 60fps or higher.
Nevertheless I'm kind of disappointed by this, tweened animation usually doesn't look very good in 2D.