That 2014 has passed which many witnesses thought would be 'very special ', and that years convention was probably going to be ''the last one", there is no reason to mention 1914 anymore, actually it has become an embarrassment!
Some die hards will probably keep bringing it up for a while, but it will surely fade away quietly until most witnesses don't even know it was supposed to mean something.
I think the whole overlapping generation thing will dissipate as well.
The problem for the witnesses is that their religion is founded on superficial things like rules and dates, and there isn't enough "there" there, which will lead to their demise, IMO.