Obviously the 3770K is showing it's age, but your 1080 still a great GPU to get by on right now. Ryzen 7000 CPUs are rumoured Sep/Oct launch. Nvidia 4000 series is rumoured Jul/Aug but I'm struggling to believe that one personally! It's possible, but don't hold your breath.
If I were you, I'd either wait for the whole upgrade (4 months time roughly?) or if you're dying to upgrade now - go cheap(er), so your outlay is less if you think you'd want to upgrade to a Ryzen 7000 CPU later in the year. As that will require a new CPU and mobo. RAM can be re-used as AM5 is DDR5 afaik, so buying DDR5 makes sense (bizarrely, even though the perf increase is sod all).
So for now at best I'd get something like the below. New mobo, CPU, RAM, NVME and PSU. The 12400F offers great performance for the money. NVME if you want a proper upgrade get a Gen4 drive as spec'd. Re-use your 1080 GPU as it's still a great for now. Then if you go Ryzen 7000 and Nvidia 4000, you can swap that out easily enough and just sell on your 12400F cpu, Z690 ITX mobo and 1080 as and when - probably quite easily at not too much a loss.
My basket at OcUK:
Total: £1,078.88 (includes delivery: £0.00)