https://www.techradar.com/news/microsoft-patent-hints-at-a-dual-screen-mobile-device-for-video-calling

While Microsoft attempts to keep tight-lipped about the hardware it’s working on, much of its secrecy can be undone when patents it’s submitted are unearthed, which gives us an idea what to expect from the company in the future.

The most recent patent unearthed by Windows Latest was submitted by Microsoft in June 2017, and published by the US Patent and Trademark Office at the beginning of July 2018, and it suggests the company is working on a multi-screen mobile device that could be used primarily for video calling.