that type of market intervention from on high is probably going to cause all sorts of unwanted side effects like driving some of the payment processors out of business.  the others will find a way to pass on fees to customers in other ways like maybe decreasing service.   in general, it's a good thing however and being driven by alternative systems but mainly by Bitcoin.  these heavily infrastructured companies will never be able to compete in the long run however with Bitcoins low costs and speed.  and they totally ignore the SOV function Bitcoin so beautifully enforces. 

bottom line:  it's a stop gap measure.  they need to do more.