At GTC Japan 2018, Jensen Huang claimed that both the GeForce RTX 2080 and RTX 2080Ti will be able to run the latest games in 4K with 60fps, even without DLSS. Jensen shared two graphics in which we see both the RTX 2080 and the RTX 2080Ti outperforming the current fastest gaming NVIDIA GPU, the GeForce GTX1080Ti, in 4K.
Source: N4G PC NVIDIA claims that both GeForce RTX 2080 & GeForce RTX 2080Ti will play the latest games at 4K/60fps