I will wait for benchmarks. Their 2x qualifier was RTX On. Not sure if they meant general performance or RTX performance only.
They found FPS increases of between 160-190% for a bunch of recent games featuring both RTX/traditional rendering, and about a fixed 190% in Quake RTX (which is exclusively RTX rendering).
On top of that - if you only care about 4K gaming then fine - but what if you're more of a 1080-1440p with higher refresh rate person?
Personally, I have a 1440p display that goes to 144hz. I'd much rather have 1440p @ 100+ FPS than 4K at 60 - but we don't know what these new GPUs will do.
Guess the benchmarks will show us.