https://www.theverge.com/2018/7/2/17524834/microsoft-surface-pocketable-andromeda-device-concepts-prototypes

The Verge revealed last week that Microsoft wants to create a “new and disruptive” dual-screen device category to influence the overall Surface roadmap and blur the lines between what’s considered PC and mobile. Codenamed Andromeda, Microsoft’s project has been in development for at least two years and is designed to be a pocketable Surface device. Last week, Microsoft’s Surface chief, Panos Panay, appeared to tease a folding, dual-display device in collaboration with LG Display. We’re on the cusp of seeing the release of a folding, dual-screen, tablet-like device that Microsoft has actually been dreaming of for almost a decade.

The original source for a lot of Microsoft’s ambitions was a device called Courier. The secret incubation project was designed to be a dual-screen digital journal, and was in development around the same time as Apple’s iPad. “Courier was really about bridging the divide between the analog world and the digital world,” explained Jon Friedman, now chief designer of Office 365, in a talk at Microsoft Build last month. Concept videos and images of Courier leaked, showing off a dual-screen device with support for inking and touch.