will Google stick with its paper approach, or will they move more towards an abstract Design language
A Tale of Two Design Languages
Stefaan Eerdekens

Actually, if you take away from MD it’s pillar – a living world of sheets of smart paper between the front and the back of the device – you loose the entire system. Material is the Metaphor is not something marginal but the foundation on which the system was built: we should always remember that all started with the question: what’s a pixel made of? Is it just a dot of light or maybe something physical?