Encoder performance until AMD can at least meet a minimum to run a Quest 2. A 6900XT needs around 1440p encode resolution around 200Mbps to try to do 120Hz, whereas a RTX 3060 does 120 at near-4K with 300 Mbps no problem, and apparently even Turing can. That matters as soon as you increase the refresh rate from the default 72Hz; on any AMD GPU currently that results in a worse overall image, but it isn't a concern on NVIDIA. The game can render at 4K with all the graphical effects and DLSS or whatever all it wants, but the end-result displayed on the headset relies on the encoder. Paying $1K for a GPU that (potentially) can't handle a soon-outdated VR headset is silly. I have no doubt Lovelace can handle it. It remains to be seen if RDNA3 can.