Why do you need 8K? There is exactly one computer monitor (Dell UP3218K) and half a dozen or so 8K TVs ($3,000 and up) to watch what little 8K content exists. Bragging rights? "Future Proof" (air quotes)? You're better off looking at how to build an actual bonafide 4K HDR workflow if you're doing video with highly color calibrated monitors, high speed storage and decent capture cameras. You're doing fine at 2560x1440 (2.5K), but you're going to skip 4K and/or 5K because 8K? Makes no sense. Unless you have a real workflow for 8K (few do), it sounds like you're spec chasing instead of evaluating your real needs. I would wager that buying a 6K/8K camera is way more important than an 8K monitor.So, what happened to HDMI2.1? A consumer 6800 has 2.1 while Apple seems to be stuck at 2.0, which means no 8k display support.
I was looking forward to this upgrade but it’s not worth it. I don’t really hit the limits of the current W5700 I’m using right now, even with 2 5k displays plus other displays, because I mostly do real-time and desktop stuff. (Although the 16GB VRAM are getting a little tight sometimes.) the big upgrade I was hoping for was support for 8k via HDMI 2.1.