The key thing to note when comparing Ryzen against Intel CPUs is that the
1800X trails the
6900K by 12% at 1080p yet moving to 1440p shrunk that margin to a nearly insignificant 4%. You can likely guess what would happen at 4K.
The more affordable Ryzen 7 1700 chip is going to be an awesome option for folks who aren't necessarily focused on high refresh rate gaming, but who want to play at resolutions up to 4K using a mid-range GPU. For those scenarios, I'd be inclined to pick the Ryzen 1700 over the
Core i7 7700K as it feels like a safer bet long term, not to mention that Ryzen's productivity performance is much stronger. However, if I were specifically interested in 1080p or 1440p 144Hz gaming, then Intel's 7700K would be the better choice.