This chart tells the real story that's a bit hidden:

Ignore all the stuff on the right. On the left, RE Village and Asscreed don't have DLSS so most likely, that is what the realistic Raster performance will be. 4080 12GB is slower than 3090 Ti. 4080 16GB is faster than 3090 Ti and 4090 is the big leap.
So this means that Nvidia rebranded the 4070 to 4080 12GB and increased the price to $900. Real 4080 is the 16GB model for $1200 and 4090 is $1600.
The Ray Tracing and DLSS are the big performance benefits while Raster looks to be the usual generational leap. With the new prices though... Yikes