TechRadar has a "Hands-On" review of the 2080Ti from Gamescom up:
https://www.techradar.com/reviews/nv...ce-rtx-2080-ti
No benchmarks yet (since they got to try it on the event PCs at the NVidia booth) but 50-57 FPS @ 4K with RT turned on for Tomb Raider sounds pretty great on a single card.