Really what's the point talking about 16k hdr in RDNA 3? In current games 4K is just about achievable and 8K is still a pipe dream. By the time 16K HDR is a thing RDNA 3 will be as dead as a dodo. Same applies for 8K and 3090 it's a gimmick to try and future proof cards, that's all. Marketing BS.
Ryzen 7 3800X, ASUS Prime X470 Pro, KFA2 RTX 3090 SG, 16GB Crucial DDR4 LPX 3000 Ram, iiyama G-Master GB3466WQSU 3440x1440 freesync 144hz, 250gb Samsung SSD, 750mb Seagate SSHD, 2TB Seagate Barracuda H/D, 1 TB Samsung H/D, 850w PSU, Windows 10