It has been a relatively slow year from Microsoft on the Surface devices front. Last year saw the company debut two new offerings, the Surface Pro 4 and Surface Book, but 2016 is yet to see a Surface-branded device enter the market. That might change before the year is up, however, as Windows Central reports that Microsoft is testing out three All-In-One (AIO) PCs to fall under the Surface banner. 

The three AIOs include a 21" Full HD model, as well as 24" and 27" 4K-sporting options. In July, a visitor to the Microsoft Campus tweeted out an image of a number of Surface devices in silhouette, each with a year of release pasted on top of it. Whether or not these reported AIOs were part of the devices in question remains to be seen. 

Along with AIOs, Windows Central is also led to believe that a successor to the fulcrum-hinge touting Surface Book is also on the way. This new notebook is said to close completely, taking care of the unsightly gap that the predecessor had.  

For now, Microsoft has not confirmed the rumours, or indeed mentioned any upcoming events. By this time last year, the company sent out invites for an October 2015 Windows 10 event, where is showcased its best offerings. 

Hopefully invites are being prepped as we speak, especially as some new Surface devices would be welcome.