Been playing it for a couple days and it runs great. Even with "Ultra" settings, it never falls below 60 FPS at 2560x1440 on my GTX 970. I'm just waiting for the GTX 1080 to drop on the 27th so I can crank it up to 3840x2160!
Nah, I'm CHEEEEEEEP. I'm still on an Iphone 4 baby and just composed some music on my Atari 800 computer (c.1979)!
I bought a GTX 1070 since I was tired of waiting for a 1080. I'm happy with it too because I got it for $399 while the 1080s were going for $650-$700. To me, the 20% better performance of the 1080 isn't worth the extra money. Same for the Titan X over the 1080. The Titan X is $1200 plus tax which makes it double the cost of the 1080 for a 20-30% improvement. Personally, I'm waiting for the new 1080 Ti as it should offer the same or better performance than Titan X for considerably less money. It rumors are correct it will be announced in January.