Processors like the 1600 don't really bottleneck @chemmajorp.
It won't even be fully utilized due to the engine, by that logic, then every system on earth is bottlenecked one way or another, where it only really applies to where the CPU is limiting the graphics card.
Kind of an annoying term.
The extra power of the 1080 will definitely help at that res to push settings.
@OP, it'll be perfectly fine, enjoy!