Nintendo DS’ book affordance

Spotted in CDG airport yesterday in France, this Nintendo DS and its lovely book-like affordance which make the user taking the same posture as when perusing a book. The dual-display device offers an interesting affordance for book reading. And, researchers have found how such setting is relevant to improve the reading experience: it has indeed been found that users of dual-display ebook readers benefits from local navigation and applicability to multi-document interactions when using two displays.