Yer but that's just a 970 3.5GB + 0.5GB. Nothing special about it.
The Nano should be faster and have full 4GB of HBM to utilize.
If their was a mini-ITX GTX 980 4GB that would be more appealing that that 970.
It is still 4GB no matter how you say it and it has been out for some considerable time. I didn't see anyone oooing and ahhhing then and I don't see why they would be oooing and ahhing now in truth. I wouldn't build a mini itx sytem around one of these but maybe I am missing something else?
4GB HBM/GDDR5 is still 4GB and seeing the performance of the FX first hand, I can't really say that the Nano is going to be a game changer.