http://www.techradar.com/news/the-next-microsoft-surface-might-be-powered-by-the-snapdragon-845

Microsoft seems to creating some kind of new Surface device powered by ARM and featuring the Snapdragon 845 chipset and LTE connectivity, judging from a new job listing spotted by WinFuture. 

The post doesn't give much information about the actual device, but there's a good chance it could be the new two-screen Courier-like device as it, too, is thought to be powered by ARM.