https://videocardz.com/newz/nvidia-geforce-rtx-3070-ashes-of-the-singularity-performance-leaks Ashes of the Singularity (AotS) Benchmark numbers for the upcoming GeForce RTX 3070 graphics card surfaced, strengthening NVIDIA's performance claims for the card being "faster" than the previous generation flagship, the RTX 2080 Ti. The RTX 3070 ends up being 1% faster than the RTX 2080 Ti at 1080p with the "Crazy" preset. This lead extends to 2.3% at 1440p, albeit with a custom preset of which details aren't known.
At 4K UHD with the "Crazy" preset, however, the RTX 3070 ends up about 2.4% slower than the RTX 2080 Ti. These numbers suggest that the RTX 3070 should still be a formidable 4K UHD gaming option, with moderate RTX effects. It should allow you to game at 1440p with RTX maxed out; and should enable 1080p high refresh-rate AAA gaming; but for those seeking 4K UHD with RTX maxed out, the RTX 3080 should be the one to buy. Then again, AMD's Radeon RX 6000 series is just around the corner, and could take a swing at this segment, with a full DirectX 12 Ultimate feature-set, and plenty of muscle.
Based on this info I personally believe the RTX 3070 will be a great video card at 1080p and 1440.