With all this talk about Windows 10 being able to run on 'all devices' as well as the Continuum feature which can turn a powerful smartphone into a desktop PC (given a dock, keyboard, monitor and mouse), there hasn't really been any hardware coming out of Microsoft that could demonstrate this ability. Until now.
The leaked photo above seems to belong to a 5.2-inch prototype Windows Phone which is said to be sporting a USB Type-C connector. It is hinted that this has a 20 megapixel PureView camera as well as a Snapdragon 808 processor and 3GB of RAM. Hopefully this device will be launched in time to ride the wave of interest that Windows 10 is enjoying right now.
Source: WindowsCentral