Per the CPA, the UCI Equipment Commission is looking into covers for disc brakes. Ostensibly for safety reasons, but I give these about a week after becoming legit that they start becoming aero accessories. Hell, as well-finished as those 3D prints look in those images, there is no way someone hasn't already started designing, especially since aero covers are already acceptable and pretty ubiquitous for rim brakes.
http://www.cyclingnews.com/...t-disc-brake-covers/
http://www.cyclingnews.com/...t-disc-brake-covers/