Lots of reviews in and looks like the 4090 is a monster. It kinda felt like nvidia was hiding their rasterization numbers but the leaks seem accurate since it actually does double the performance of the 3090 in some games at 4K.
Most seem to agree that it's the biggest generational boost in performance in a long time.
I guess that goes along with the biggest generational boost in price.
Now hopefully AMD can come close while undercutting the price. If there's lots of stock on the 4090's though it's going to be hard to resist