Hmm, I am also interested in this.

I have heard a lot of reasons why they should not be on road-bikes, but since then technology has moved forward and components have become more advanced.

Right now it is probably seen as uncool, as anything else that deviates from the norm. But that would not stop me from using them if the functionality is there. Over time, it is inevitable that we will replace the current style of brakes similar to how it happened in other brands of cycling like on mountainbikes.

Aesthetically I think it is a trade off, it looks a little cleaner but I am not sure if I like the way brake discs look around the center of the wheel.