I do find it interesting that all the review/first impressions coming from the sites with these monitors in person tell us they will never go back to their IPS monitors to game again after using it (the ones I've seen at least). Then you see so many people here saying that it is useless if it is not on an IPS panel. I can only assume it is as everyone one who has seen it in person has said, you have to see it to understand. I can only take their word for it.
That said, Asus does make IPS panels as well, who is to say we have to wait long for IPS G-sync monitors? We only know about one monitor that they have. We do not know about other possible models.
I do want a G-sync monitor, but I will likely wait a few months to see what is being offered before I jump on board. I'm currently leaning towards a VG278H model, if one is made.