The actual hardware is a Raspberry Pi 3 B+, booted over PXE, with the official 7 inch touchscreen, mounted on a 3-gang wall box ... The 3D printed mount finishes the project nicely.

[Andrei Istodorescu] has been hard at work building a 7″ touch-screen rig which runs XBMC. It may be upside-down, but the Raspberry Pi board which is front and center is still easily recognizable.