For those who would like to read more about the design philosophy of Metro, I would recommend "Brave NUI World" (Wixon). Another book "The Mobile Frontier"(Hin

For those who would like to read more about the design philosophy of Metro, I would recommend "Brave NUI World" (Wixon). Another book "The Mobile Frontier"(Hinman) briefly summarizes NUIs in Chapter 2, and concludes with an excellent interview with Mike Kruzeniski (Creative director at Microsoft in the Windows Phone Design Studio). Hinman describes our current situation as being stuck in a chasm between GUIs and NUIs, with designers taking entrenched metaphors from GUIs and attempting to apply them to gestural interfaces and NUIs. Hinman, Wixon, and Kruzeniski argue that skeuomorphic designs are insufficient for ephemeral and networked information. Essentially, "Authentically Digital" means "content is the interface". Its a shift to focusing on the interaction, not the interface. Kruzeniski cites Photosynth's UI as an example of where mobile UIs are going. As an Android developer since 2009, Windows Phone has me pretty excited from a technological standpoint. Android and iOS are essentially WIMPs with desktop metaphors. Maybe iOS has more skeuomorphism. But I see Android's Holo as simply a theme, not a fundamental difference in the UI of the system. Just lipstick on a pig, err WIMP, essentially.