What amazes me is people are so indoctrinated by Intels "More Hz is better" that they cannot fathom or understand that AMD's IPC is not only equal, its actually better than Intels, and that means AMD's new range at lower clocks actually equals and or betters Intels higher frequencies on their chips.
So they had the 3800x on stage in PUBG equalling and or bettering the 9900k, both were run at stock, so if we break this down lets look at a few factors here...
PUBG notoriously bad on previous Zen chips, Intel chips due to better single core performance outpace previous Zen chips
9900k has an all core boost of what? 4.7ghz? and a single core boost of 5ghz
3800x has a reported max clock of 4.5ghz, you can presume the all core boost is a lot lower, probably the 4.2 - 4.3ghz range.
So with that said, if PUBG was running on the 9900k single threaded at 5ghz vs AMD's 4.5ghz and AMD was equalling and or bettering it, then you can pretty much assume that AMD's single threaded performance is equal or better than Intels, and at a much lower clock speed.
If both chips were running at their all core boosts, again the Intel chip was running probably 4-500hz higher than the AMD and still being equalled or beaten by the AMD chip, again in a game that historically favours Intels performance.
So my take from this is AMD's single threaded perf has improved drastically, and at low clock speeds as well it is able to match Intels higher clock speeds, and if the rumors of plenty of gas left in the tank for overclocking are true, that 3800x with all cores at 4.5ghz will ruin the 9900k, should you be able to push those cores higher then it is looking pretty bleak indeed, even for Intels new 9900KS.
This is all speculation on what we have seen so far and what has been coming out of Computex etc, there are a few questions id like to see answered however still, such as the difference between the 3700x and 3800x rated TDP, its quite a huge chunk, and its rumored they are both single CCX chips, something tells me that 3800X has a lot of room for pushing given the TDP limit, to push that chip further.
I think Lisa Su and AMD intentionally sandbagged its theoretical performance, and only showed an apples to apples stock for stock performance, showing their 3800x at absolute stock matches the 9900k at stock, and yes they both have more room to be pushed, except i think finally AMD's IPC is stronger now, so pushing AMD will just make the gap between them both further apart with the AMD chips being the clear winners finally.