If you head to the ACNA Gafcon page now (here) you will see a report of a communion service in Kenya for the GAFCON Primates at which ++Justin preached, ++Wabukala presided, and ++Duncan (Archbishop of ACNA) assisted at Communion. Look also here, from which the photo below is taken. (A further report re ++Welby at GAFCON is here).
Yes, that is a sign of the importance of GAFCON: many Anglican primates and bishops conferring together in shared communion about the future of Anglican-shaped mission in the world Christ died for. Increasingly this mission is going to be carried out by those willing to break bread together.
A sharp question being posed to the body known as the 'Anglican Communion' is whether this body encompasses Anglicans in action today or a past 'use by date' definition of who Anglicans are (or were).
I am confident that under ++Justin the sharpness of the question will be understood. How the question will be answered is going to be observed in the next decade, with Lambeth 2018 offering crucial evidence for progress in the answer.
We need some flexible Anglican intellectuals, able to juggle the competing aspirations in the situation, just like these amazing Arsenal footballers as they score the most amazing goal I have ever seen in my life ... (an earlier embedding of the goal has been removed by YouTube) seen here or here or best is here.