Marvel Entertainment has a new trademark for the phase "registered gifted" in order to described all super powered individuals. Marvel will most likely use this phrasing in Avengers: Age of Ultron (and all other movies moving forward) in order to describe new team additions Scarlet Witch and Quicksilver—both of whom will probably be referred to by their non-mutant names, Wanda and Pietro.
Not being able to call mutants as such is a problem but nothing that hasn't been resolved per the new trademark. Marvel has not confirmed this report but it makes sense seeing as how they need a way to described those who could be viewed as mutants and this allows Marvel to label all super powered individuals under one label in both their TV and movie properties now. Note: This will not affect anything in the comic universe since Marvel can call mutants as such in that medium and this is only for TV and movie media.
Agent Coulson and his new team will be entertaining you while you're on your living room couch starting September 24 at 8 p.m. Eastern, on ABC.