I'm clueless about this space so apologies if it's a stupid question.
If you've done a driving game with a force feedback wheel vs without, its amazing how much the haptic feedback adds. Now spread that out to all those sensations that make up any activity; "VR" hasn't done much more than nod to the desirability of more complete feedback.
IIRC Neal Stephenson had some hard lessons when he tried to develop a VR fencing game; you can't do much to simulate hitting things without actually hitting things. see https://www.kickstarter.com/projects/260688528/clang
https://teslasuit.io/ (A shirt)
https://www.vrgluv.com/enterprise
Mostly gloves but the tech is there.
The vast majority of video games these days are of the genre where you're moving a humanoid character around in a 3d environment. I'd love to see somebody come out with a bridge that allowed you to hop between various types of those games.
You should be able to seamlessly go from playing Tony Hawk Pro Skater to Grand Theft Auto to Skyrim on the fly. The only real differences in those games are the scenery and what details they chose to spend effort refining. One day somebody will figure out how to extract the commonality and convince enough studios to get on board building on top of it as a platform, and you'll get a pretty good first cut of the Oasis.
As you implied it would be expensive to experience the cutting edge right now but here is what it would look like:
You would want a really high end headset, a haptic suit, haptic gloves, graphics cards and a pc to run it, and game to actually experience it.
-Pimax 8k $1500
-Research grade haptic gloves[0] $5000-$10000?
-Tesla Suit $2750
-Gaming pc and Scalped 3090s to run in SLI $10000
You could do a treadmill too but I actually don't think that tech is quite there yet and question just how much more immersed you would be at that point.
Now once your discount iron man suit is fully equipped what game do you actually play? You mentioned skyrimVR it actually has ok haptic support via mods.
However, what you really would want to play for the full Oasis experience is VRChat where with your haptic suit you could high five someone or feel them tap on your shoulder. It's also a thriving community full of bizarre worlds and avatars. Most of the hardware isn't directly supported in VRChat but you can find guides online of people getting it to work.
Metcalfe's Law (and Reed's Law) state every time some new development gets added to the networked world the value addition may scale geometrically or even exponentially because of how many people get exposed to it thanks to the network...when that kind of growth happens all kinds of unimaginable things are possible.
At this point of time, The money, infrastructure and amount of work required is damn high when compared to the returns we get from the post work. The whole VR/AR/XR/MR are at pivotal stage and not that efficient. According to my knowledge you can expect something like that by end of the decade.
A neural link would directly stimulate the brain to directly experience the sensations of the virtual world without directly feeling the impacts of attacks or fall damage, and aside from uncanny valley issues that is the last great frontier of computer gaming. It is also the difference between what we have and what Ready Player One had.
If all of human science and effort were bent on creating neural link technology like that I would guess it would take us at least 20 years to pull that off, so if that ever happens I'm sure it will be long after we are all dead and gone.
Putting all of human science together as well as not being realistic isn't that efficient, taking the covid response as an example.
Not to say the Oasis-type design isn't possible, just that we're aren't there yet, but as @rir494 said, it's hard to predict until you know what kind of resources and growth are really possible.