I'll be sitting Navi out. I forget where, but someone said Navi feels like Zen 1, a necessary step, but leaves plenty of progress to be made. I have to agree. There's worthwhile changes, but overall its not enough for me to upgrade especially for the pricing. I'm hoping Arcturus provides a very worthwhile next step, with it being like Zen+ where it had a good mix of improvement but most importantly got pricing in check so that perf/$ really jumped. So kinda like how we saw the 1800X to 2700X. I'm hoping Arcturus gives us another 15-20% performance while getting pricing to the ~$300 range. Which, hopefully they make some gains in traditional rasterization and its not focused on adding ray-tracing hardware (unless its worthwile, like we start to see games actually get performance improvement from say hybrid ray-traced lighting, and the hardware helps improve performance by a good amount).
I'll be interested to see if Navi gains like previous AMD chips have as well. Which that might be more an indication (or indictment) of their driver/software support than anything, so if it doesn't probably just means they're doing a better job of getting utilization from the get go. It'll also be really interesting to see how dGPU Navi differs from the console versions (I have a hunch it'll be quite similar, but probably with some bits for ray-tracing added; it'll be really interesting to see how those differ between the consoles and if any of that can carryover into dGPU; this is one of those times when I wish that AMD, Sony, and Microsoft would collaborate so we could have a consistent one that could be used across consoles and PC).
For now, I think I'm most interested in the new video processing block though. They're claiming some pretty big gains there. After Handbrake added support for their encoder, I can say it definitely needs it. Their h.264 encoder is outright worthless (terrible quality, CPUs can encode better quality as fast or probably even faster), but their h.265 encoder is ok (has a sweetspot where it offers pretty decent quality for the file size but above that you don't gain much and below it you really start to lose quality). Which, maybe that's more Handbrake's support of it (and it improves), but it sounded like Nvidia's was considered considerably better (but again, that might be due to better software support). I hope its robust and programmable since it seems like we might be moving on fairly quickly from h.265, but there's a bit of a format war brewing.
Which not sure why they didn't add HDMI 2.1 support (that's one of the reasons I'm passing on Navi, although it might work out better for me, as maybe we'll have DP 2.0 in time for Arcturus to support it, so can get both at once; something tells me it'll be same situation, we'll get HDMI 2.1, but get stuck with DP 1.4).