I may be in the minority here, but I am not too elated about this news... Operating out of T8 is far better than T7 with significantly more connectivity through AA than BA/FI could ever offer to AS.
JFK needs to get their priorities together and move forward with completing T8 construction then having all of OW move under one roof before razing T7 to make room for further terminal developments that will maximize space. Same can be said for T2, but DL just got a new T4 wing so they can wait.