Microsoft is reportedly working on four new Surface devices

To the surprise of no one, Microsoft has plans to release a successor to the Surface Pro 4, the Surface Book and possibly two mystery Surface devices.

Shubhan Chemburkar, an Indian app developer snapped a revealing photograph during a recent visit to Microsoft’s Surface production facility, the same location MobileSyrup visited just a few months ago.

see here pic.twitter.com/Tri8HDI1w5

— Shubhan Chemburkar (@shubhan3009) July 3, 2016

Toward the building’s entrance is a wall with placards showing off Microsoft’s various iterations of the Surface. According to Chemburkar, there are four placeholder signs, three that read “2017” and “coming soon,” with two likely being after the Surface Pro 4 and Surface Book, and the remaining placards the two mystery devices.

Other than this small piece of information, we know nothing about Microsoft’s upcoming plans for the Surface line, though Surface 3 production was recently halted. A DigiTimes’ report earlier this week, however, indicates Microsoft is planning to release an all-in-one Surface Book at some point in the near future.

While the Surface had a rocky start, Microsoft’s Surface line has quickly become an integral part of the company, with revenue amounting to $1.1 billion in Q3 2016, an increase of 61 percent from the same period last year.

[source]Twitter, DigiTimes[/source][via]The Verge[/via]

Related reading: Microsoft’s Panos Panay talks about the death and rebirth of the Surface