I'm not sure why so many are surprised - figured they'd pull a refresh once they said no next-gen until 2025.
The big question is how much of a leap 50xx series will be, and if it's a repeat of 30xx (instantly eclipsing the 20xx Supers).
I don't think it's much of a question; just add the bandwidth from 32Gbps and the extra cache/bus width of a 512-bit card and you have an approximation of your answer.
The "?" is GB205, which is less clear. Considering it is '05' and not '04', I'm under the current impression it will be 192-bit/GDDR7 or 256-bit GDDR6(x). If it were 256-bit GDDR7, it would likely be called GB204.
As I've said before, it's likely 4070Ti Super will be aimed at not giving people 50TF (ootb, *maybe* with OC), which *appears* an important metric for many games currently. 50TF+ *could* give an extra bump in DLSS/FSR scaling at certain resolutions or scaling from a PS5pro, which it appears they will keep as the reason to buy a 4080. It's also likely around ~1/2 of what the 2028 consoles will be. nVIDIA likely wants to keep such a card below that metric to encourage selling new cards at that time.
Enter GB205, which will likely be slightly better than 7900xt/Navi 4/BM. Maybe 20% (if you do the math), or one product/half a segment higher; perhaps similar perf (but *just-enough* better than a 4070 Ti Super) for a cut-down version. While it will likely have improved RT versus a AD104 and perhaps even AD103 due to clockspeed (~3300mhz?), you'll have to ask yourself if something like that is worth waiting for and paying the likely premium (~$800 again?). I think it will be something like 9216sp @ higher than proportional clock than the 4080 (10240sp) refresh, and I will be thoroughly amused if it is still 12GB. That's ofc why we must wait and see, but you can start to see where they would pigeon-hole it and whom would be the potential market. If they went 256-bit/24gbps GDDR6(x) the clock could be *slightly* higher and be more in-line with what to expect from n3e products (~3700-3800mhz?) or a diff config due to cache, but still in that approx realm of performance. >20%, but less than any meaningful amount stronger (wrt raster).
TLDR: A meaningful update in raster from 4070 Ti Super, but perhaps not 7900xt/Navi 4/BM/4080. Once again, this is how they 'getcha', and also why AMD/Intel are targeting that exact performance level. I don't know how Navi 4/BM will stack up *exactly* (should be pretty close), but if you are one those people that aren't sold on (what I consider compromises for) RT, I think 7900xt is going to have a VERY long life all things considered. I don't know if the same will be true of 4070 TI Super, which to me looks like a stepping stone to people buying GB205.