No, that's only for their APUs, which are using last year's Zen 2 CPU architecture combined with "somewhat decent" integrated graphics, and should perform similar to their existing 3000-series parts on the CPU side of things. There will also be CPUs launching without integrated graphics though, and those will be built on their new Zen 3 architecture, and should feature more performance than current models. Those will be available at retail, and are the ones that would be preferred for someone building a gaming PC with a dedicated graphics card, though they haven't been officially announced yet.
As for upgrades from a 6700K, I would probably just stick with that for the moment, unless you are noticing performance instability in certain heavily-multithreaded games, and feel it's worth spending hundreds of dollars to address. Intel's processors are still using a very similar architecture to the 6700K, only now with more cores at any given price point, and somewhat higher clock rates at the high-end. In general, a 6700K without overclocking performs rather close to their current $150+ processors, though for under $200, it's possible to move up to 6-cores and 12-threads with similar performance per-core with something like an i5-10400 (or a Ryzen 3600). Games and the vast majority of software should still get along pretty well on 4-cores with 8-threads, though it's possible that games will increasingly want more as they start targeting the next generation of console hardware.
As for AMD, they are far more competitive now than they had been when the 6700K was current-gen, coming close to Intel in terms of per-core performance, and they had been offering significantly more cores and threads at any given price point, at least until Intel recently launched their 10-series, which come relatively close to them in terms of pricing. So, they've been very competitive, and have pushed Intel to increase their mainstream core counts as well. Again though, as far as performance-per-core is concerned, a 6700K still is still fairly competitive against the current Ryzens, much as it is with Intel's offerings. The main thing an upgrade would be getting you would be more cores (an 8-core, 16-thread 3700X is under $300), though that will primarily be beneficial to software that can utilize a lot of cores.
Personally, I would probably wait a bit longer. Maybe the Zen 3 CPUs will outperform Intel a bit at gaming, but it's still unlikely to be a significant difference.
What resolution and refresh rate is your screen? At higher resolutions than 1080p, you are likely to see more benefit out of a graphics card upgrade, though as Karadjgne pointed out, a GTX 1070 is still a decent option for 1080p60 gaming.