Able Seafarer-Deck?

I just recieved my STCW endorsement as Able Seafarer-Deck. I applied for it because I realized I qualified for it, and figured that employers would probably soon require it to sail international.

My question is this: Does this in essence replace the tiered current domestic AB ratings? Or will it eventually? I am very confused about the purpose of this endorsement which I now hold! Haha!