Samsung patented touch-sensitive keys, which are located according to the sides of the phone. They have all the chances to do different functions in different Additions - Management riding fun in a racing machine, the attachment / exclusion of features and modes, and the camera that way forward.
This idea reminds helluva lot FiT - phone swipe control technology according to the edges of the screen for the first time appeared in the ZTE Nubia Z9 (property and identity), and later implemented in the ZTE Nubia My Prague (announcement).
In general, a certificate Samsung probably was filed much earlier announcement of Chinese instruments. Will it be as soon as something is sold, it is not clear.