The first line of your post is exactly the point that me and Tyke are trying to make, there is no best VR experience possible and there won't be for years. The tech is moving way too fast and they are throwing various solutions at the wall and seeing which ones stick. And it's still in the stages that a person's head shape, facial features, IPD etc. will have as much impact on a person liking a VR headset as the tech that the headset has.
What I am trying to say is that if you find a headset that you enjoy, you should buy it and use it, rather than wait for a headset which might be a lot worse for you. Or could have a load of problems at launch. Or might be just pure crap despite the tech specs.
Just have to correct some of your misconceptions about the the Quest Pro. It's called Meta Cambria. And it's not aimed at gamers but It is compatible with Quest 2 games. Meta Cambria is aimed at the MetaVerse. Getting Facial interactions, eye movements etc into VR and also a much better mixed reality experience. It seems to be an AR/VR headset. Most of the features that the Meta Cambria will have, won't make much, if any difference, to the gaming experience. Especially PCVR games. We don't know if it will even connect to a PC, it's more than likely that it will be Standalone only. And, we don't know what Resolution it will be using. If it's a headset aimed at mainly Social VR experiences/prosumer market then it might have a lower resolution than the Quest 2.
Also, the price is going to be high. Somewhere between $1000 and $1500. I will be very surprised if it's much less than £999.
I don't care if you keep the Quest 2 or not. That's entirely up to you. All I am saying is that you shouldn't base your decision on rumours. Base it on facts, things you actually know to be true.
There are a couple advantages of keeping the Quest 2. When you get a new GPU, the Quest 2 will improve. You get to play VR games now, not in some imaginary time in the future. And lastly, all the headsets that are coming out this year seem to be on the expensive side. So, if there is a headset released that you want to upgrade to, you should be able to sell the Quest 2 for a good price. The high end headsets been released won't have any impact on the second hand sale prices of Quest 2's.