True, the new generation offers better price/performance vs the previous generation.
Do note that the 3080 is still 2 weeks away (17 sept), 3090 24 sept, 3070 in October.
I would consider getting a non-founders edition though, in the past other brands have had better/more silent cooling for pretty much identical pricing.
Edit: While the 3090 (350W) is the only one requiring a 3 slot cooler, all 3 use the new 12 pin power connector. The 3080 founder edition power draw is still 320W, vs 220W for the 2080.