That could be extremely bad for the financial trading sector, as they rely on RDMA to do their work. They also require internet connections to their computer clusters, so no option to turn it off or secure their network from the outside. Not a single company is going to turn the feature off and take a guaranteed loss in millions of dollars profit against the threat of a possible loss of profit.
I didnt see whether this required local access or not though. They talk about the attack, but no mention of whether the attack can be executed remotely against the target. Hopefully not as that would solve much of the problem.