You can't say AMD never been competitive, a lot of amd cards have better results for less money, Nvidia master the high-end market since a few years but not always been the case. It might be since 8-10 years that nvidia performs always better, but amd has always stayed fair and with a better vision of gaming. Nvidia is more powerful, got more money, and bought every techs or companies that developped things better than them. They stole ingeneers from amd and other companies, and stole ideas too, concepts. The war between the two is not new, and the games otpimizations depending on whose company they made deals with neither.
Even if the witcher 3 will use nvidia properties techs, doesn't mean the game won't run good without nvidia gpu. They need to improve the game the best they can for consoles too, and PS4 and Xboxone both have AMD gpus, because Nvidia asked too much money to develop for microsoft and sony. There are a few great videogames which run better with amd cards than they do with nvidia, latest tomb raider, total war rome 2, and a lot of others I don't know all titles.
If Amd had the half of Nvidia investors and money, they would surely take back the lead. If Nvidia didn't bought PhysX orginal company, things would be totally different today. They bought 3dfx ten years ago too, and that's the only reason why they stand for leader on gpu market now : they had more money to buy others and destroy competitivity. Plus, when you see how badly a lot of Nvidia Gameworks Program games run, you wonder why they advertise so much about a thing that is totally screwed and full of bugs on a lot of games. Some big titles comes up with new nvidia techs which are supposed to blast our eyes, but don't always keep their promises.
Anyway, I hope it won't ruin the Witcher 3 and will work great on both amd and nvidia cards.
