I sincerely doubt it. When one looks at the history of the Dutch Reformed church, the divers and sundry splits make a New York City road map look like a well arranged tapestry.
Furthermore, in the case of the OCRC that 'offer' was on the table many years ago and it didn't take. Now the OCRC embraced the call for union but, in my opinion, mainly due to the fact that it was too small to maintain its own identity (5 congregations - though that is not necessarily a bad thing).
And as far as the CanRC and URC is concerned, it is not necessarily a done deal.
On the other hand the URC has moved to the second step of Ecumenical Relations with the OPC so that might also encourage our Presbyterian brothers to see themselves as participating in the larger Reformed ecumenical movement that is at foot.
I think we are all guilty of 'micro' something or other and groups such as NAPARC are an encouraging trend for us all but by no means the end to the (seemingly) constant divisions and struggles in the Reformed/Presbyterian world.