Did you buy/build one yet?
The 4090 is now rumoured to be launched at the end of July, although it will likely be a couple months after before you can actually get one. You’ll more likely want a 4080 than a 4090 too, so I guess quarter 4 2022 is the realistic timeframe.
If you haven’t bought a PC yet I’d personally wait. If you buy yourself a PC for Christmas you can probably treat yourself to a 13900k 4080 system, which seems worth waiting 5 or 6 months for.
If are set on buying now at least make sure you a 1000 watt CPU if you plan upgrading past the 3080Ti. My 3090 runs fine on an 850 watt but I wish I had a 1000 watt as I want a 4090 now…