Well the discussion amongst Digital Foundry and the like recently is whether when we were asked to "Do the Math" did "2x Xbox one X GPU power" mean 2x 6TF and therefore 12TF??That they aren't using like-for-like teraflop measurements.
Or did it mean two times the effective power, which with new architecture (Navi versus GCN in the X1X) would have been about 10 TF??
Many thought it would be the later as it seemed more realistic, given that the most power GPU AMD make right now is about that number (9.7ish) but in actual fact, the announcement two days ago was that it was actually 12TF after all.
I don't think many actually saw that coming because it represents more than 2x the power in actuality, and it means it has a GPU more powerful than anything AMD currently make, to add to that, its using a newer architecture than all of their released GPU's (RNDA 2.0 vs 1.0 in the current PC GPUs) so there could even be a further disparity between what 12Tflops means when compared to 6Tflops and what we actually will get.
Then the added tech such as variable rate shading will probably bring something like a 15-20% improvement in frame rate with no loss in picture quality.