For comparison, the GeForce RTX 3080 offers peak single-precision (FP32) performance of 29.8 TFLOPs. The single-precision performance for Navi 21 comes out to 22.5 TFLOPs. So far, the GeForce RTX 3080 seemingly has 32.4% higher single-precision performance than Navi 21. However, Navi 21 does pull a win over the GeForce RTX 3070, which is good for 20.4 TFLOPs.
All of this is meaningless when you consider that even the "36 Tflop" RTX 3090 performs more like a 20 Tflop Turing card in games. Nvidia made changes to their architecture with Ampere that affect FP32 compute performance resulting in those huge compute numbers, but those changes don't equate to equally-large gains in gaming performance. So, an RTX 3090 typically ends up only around 50% faster than a 13.5 Tflop 2080 Ti as far as 4K gaming performance is concerned.
Now of course, that doesn't mean the 80CU RDNA2 card will outperform a 3090, since we have no idea exactly how RDNA2's ratio of gaming to compute performance compares. As Ampere should make clear, more Tflops doesn't necessarily mean more gaming performance. At least Nvidia seems to feel it won't outperform the 3090 based on pricing, but their relatively competitive 3080 pricing indicates they feel it could be competitive with that card.
In other words, AMD will only be able to compete with nVidia's mid range offering yet again, and will be significantly slower than the 3080, which means sky high GPU prices for at least another two years...
Since when is a $500+ graphics card "mid-range"? Just because niche "enthusiast" hardware becomes available at even higher price points doesn't mean that cards filling the "high-end" segment are suddenly "mid-range".
And as already stated, you can't directly compare gaming performance by Tflops alone, since different architectures can offer more or less gaming performance relative to compute performance, and that ratio changed substantially going from Turing to Ampere. If it were to remain mostly unchanged from first-generation RDNA to RDNA2 though, a 22.5 Tflop card could be right around the performance level of a 3080.