i was gonna get a 700 series card, but I'll wait now to see exactly when witcher 3 comes out before I upgrade. Yes, its that important. Games like that are few and very, very far between.
I know how you feel, I personally cant wait for Fallout 4, im not sure why but I loved 3 and NV, and dumped so many hours into both. I have both Witcher games, but have not actually played them yet, but I do plan on completing them soon.