The benchmark were performed on a system with the unreleased AMD Ryzen 9 5900X processor. According to AMD's own results, the Radeon RX 6800 is roughly comparable with the NVIDIA GeForce RTX 3070. In some games the Radeon RX 6800 XT even managed to beat NVIDIA's current flagship, the GeForce RTX 3090, but it really depends on the game as in some titles the RTX 3090 remains faster than the RX 6900.
It's definitely going to become an interesting month with the launch of AMD's Zen 3-based CPUs and the first RDNA 2-based GPUs.