Assuming you’re primarily interested in gaming performance; wait for reliable 3rd party non-DLSS benchmarks.
From the Nvidia presentation, the 5070ti looks great, but the performance uplift over previous gen in their slides pretty much only applies to games with frame generation. Not every game will implement DLSS 4 let alone DLSS. You may still need the better rasterisation of the 5080 depending on your monitor resolution and desired fps.