The Thunderbolt cables They are the future together with USB 3.0, but to maximize the speed without losses over long distances it is necessary that the data go through fiber optics within the cable, something that until now no manufacturer had dared to do.
Maximum speed
The cable is manufactured by Sumimoto Electric Industries in Japan and can be up to 30 meters in length without -on paper- losing any type of speed, maintaining the thickness of current cables and being able to be flexed at a maximum angle of 180 degrees, which gives it tremendous versatility to go where we want.
Logically they are high performance cables that for example can be used in hard drive racks where you want to maximize speed, something that will also make them have a very possibly prohibitive price for the vast majority of users, so I would not be surprised if the sale was exclusively aimed at professionals .
By the way, not everything was going to be good: Fiber optic Thunderbolt cables are only capable of carrying data, so we will need a power source for everything we connect.
Source - MacRumors