I just had a quick look at the reviews. So the RTX7900XT is bit faster overall in rasterisation(but slower than the AMD slides implied) than an RTX4080,but the latter is about 15% to 20% faster in RT according to TPU. It seems the RT uplift is actually much larger than I expected since it seems to be slightly better than an RTX3090TI according to TPU:
AMD Radeon RX 7900 XTX Review - Disrupting the GeForce RTX 4080
Navi 31 is here! The new $999 Radeon RX 7900 XTX in this review is AMD's new flagship card based on the wonderful chiplet technology that made the Ryzen Effect possible. In our testing we can confirm that the new RX 7900 XTX is indeed faster than the GeForce RTX 4080, but only with RT disabled.www.techpowerup.com
It seem's the uplift in RT is greater than the uplift in rasterised performance!Still overpriced like the rest of them!
Yeah, this is my take on it as well. It's not a bad GPU at all despite the usual suspects bleating. It is certainly a vaible alternative to the 4080 give the relative price/perf.
Just neither are priced remotely realistically IMHO and for what it's worth neither is the 4090.