The game won't launch before seven months or so, until then there will be new graphic cards and as said before, what marketing call "next gen games" like watch dogs already need high end hardware to run. If you don't need to upgrade now, those who have a small computer should save up money in order to buy new hardware only for the witcher 3. I've got a gtx 680 which ran all games ultra at 1080p but watch dogs don't, and I'm gonna put money aside so I could buy a new gpu for the witcher.
Isn't that card stronger than GTX 760? That's the card I have and I run Watch dogs on ultra 1080p 30-40 FPS.