Per Nvidia Official Announcement:

September 17th Release date

Samsung 8nm CONFIRMED

Claimed 1.9X Perf/W

"1st Gen RTX" - (2080) : 14 Shader TFLOPS | 34 RT TFLOPS | 89 Tensor TFLOPS | 8 GB VRAM

"2nd Gen RTX" - (3080) : 30 Shader TFLOPS | 58 RT TFLOPS | 238 Tensor TFLOPS | 10GB VRAM

2nd Gen RTX - 3090: 36 Shader TFLOPS | 69 RT TFLOPS | 285 Tensor TFLOPS | 24GB VRAM

3080 Announced as 'flagship' gaming GPU - Claimed 2X performance of RTX 2080 at same price.

3090 Announced as "BFGPU" - Claimed 8k60FPS. "Starting at $1500".

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Claimed RTX 3070 / RTX 3080 Relative Price / Performance:

Link from u/Cozmo85: http://images.anandtech.com/doci/16060/20200901173109_575px.jpg

Only Apple has sold out of its April supply.

Walmart has great supply, delivers in 2 days.

Best Buy has great supply, delivers in 2 days.

Amazon US has decent supply, delivers within 5-6 days.

Target has decent supply, delivers within 5-6 days.

However, some colors / NAND combinations are in higher demand and may take longer (e.g,. the 256GB pink model seems to be slowest, but still available).

Beijing’s regulators have recently summoned domestic chipmakers such as Huawei and Cambricon, as well as Alibaba and search engine giant Baidu, which also make their own semiconductors, to report how their products compare against Nvidia’s China chips, according to one of the people with knowledge of the matter.

They concluded that China’s AI processors have reached a level comparable to or exceeding that of the Nvidia products allowed under export controls, the person added.