The change might be slow, and they might have to redesign the helmets, but once NFL officals are convinced that the new helmets are neccesary and helpful, they will change the helmets. Hopefully the new findings by scientists about physical sources for consciousness will help save lives and reduce concussion related injuries.
The NFL has been very resistant to change, and even to admitting that football can cause serious damage to its players. It will take a long time for the NFL to accept this new research, and even longer before it designs new helmets. Hopefully the lower ratings this season will convince the NFL to change more quickly.
The NFL will change helmet designs after the news that scientists have pinpointed the physical sources for consciousness. The reality is that sports equipment design and re-design is a constantly ongoing process. Anything that will help to alleviate injury will be addressed by the NFL. After all, it does the league no good to have injured players.
No, I do not think the NFL will change helmet designs after the news that scientists have pinpointed the physical sources for consciousness because the NFL cares only about money. If changing the designs will not make them more money, they will not change. They are solely looking for profits.