Reviews are out, and the cards are okay. I guess. A 2060 has 160 TDP, while a 5700 has 180 TDP. Not that huge of a difference. Temps and performance seem to be about the same give or take a few degrees/FPS. 5700 has 2GB more of RAM so there's that. But it lacks Ray Tracing which is kind of going to be a big deal eventually.
What kills it for me right now though is the lack of Fans in any of the 5700 models. Blowers are dumb and noisy. Hopefully some company puts together a fan based model for around $300. The official launch editions of new GPUs are always more expensive than the ones that come later. So with any luck 5700 models with a fan will be $50 less than Nvidia's competition.
P.S. The new Ryzen CPUs are just flat out better than Intel's CPUs. IMO 2700, or 2700X were great bang for your buck CPUs. New Ryzens are even better bang for your buck, and the 3900X beats Intel's best CPU in most everything.
The 9900K is still the best gaming CPU, probably best you read the benchmarks. Also the GPU TDP is actually the whole board and not just the chip.