The game doesn't always stay above 60fps, but it still plays really well MOST of the time. (there was some noticeable slowdown, in a few places, but nothing was a deal breaker) Overall, an i7 and a GTX 1070 kind of feels like what Ubisoft was targeting for the "recommended" experience, with this game. It's honestly enjoyable.

This video shows what I consider to be the best combination of settings to make the game play well, while maintaining a nice amount of eye candy. I show some exploration, several police chases, daytime, nighttime, and even some rain. Feel free to scrub through the video, to see what interests you.

i7 4790, not overclocked
16GB RAM
Zotac GTX 1070 AMP!, overclocked, 2000Mhz
SSD
Windows 10