The big problem with running disc brakes are the frame and fork are not designed for discs and the wheels aren't available as a 130mm ISO hub. Converting ten + wheelsets over to disc brakes isn't going to be efficient for minimal if any performance improvements. Carbon frame moulds are very expensive to produce so don't expect any of the highend carbon brands like Stevens or Ridley to offer a disc brake model anytime soon. Lapierre were the ones who lobbied the UCI so I expect their one pro to be on one. The technology is a couple years away for anyone at the highest level of the sport to run discs. Besides, Belgians are still using Heart rate monitors to train instead of powermeters, and only eat white bread and pasta on race day, they are a little slow to adopt anything new.