Ah, I support Steve & crew on Patreon. Yes, GN stopped doing their game analysis videos a while ago, so TPU is the best source for finding out what games really demand out of hardware. Digital Foundry's new PC guy Alex is doing a decent job too, but seems to test a very narrow selection of hardware so far.

Quadro RTX is confirmed to be Samsung, though of course the GeForce cards will likely be multiple-sourced as always.

Remedy's Control and Metro Exodus seem like the only games with partial ray-tracing support. But really, they'll be 99% rasterized, maybe some reflection or lighting effects here or there will have an optional ray-tracing Ultra setting. I don't expect anyone to invest much into RT till next-gen consoles, assuming Navi supports RT. Unreal Engine and Unity have both announced support for DXR, but that doesn't mean anything for game developer adoption. Things take time in this industry - I mean, it's been over 3 years since DX12, and there are precious few games using it. It almost seems like there were more games using DX12/Vulkan (at least partially) in 2015/16 than in 2018.