It's lacking the stereoscopic 3D effect of VR. You're looking at a single flat 2D image.
So it's a downgrade in terms of immersion, but has no stereoscopic side-effects.
Since there is very little z axis movement in this showcase (you would walk into a screen at some point), it shows scenes that naturally come with very little side effects for VR users.
An array of single flat 2D images, if I'm understanding the set-up correctly, but yeah.
You'd walk into a room filled with wall-to-wall TVs and props (maybe even some carefully-placed additional TVs for creatures to appear on nearer to you, which would switch to like bookcases when not showing a zombie?) and you'd look around and shine a flashlight and interact with the images, and it'd all be very high fidelity and cool to look at from a distance but it'd still only ever be as close as a TV on the wall is to you in the middle of your room.
The magic of The Volume is that it's all oriented towards the camera. So there's a fake horizon line and there's corners added to flat spaces and there's proportional parallax movement when needed as the camera pans/zooms and there's whatever needs to fill up the frame for the camera to work with. Yes, the overall effect is better than bluescreen for actors since they know what generally the place their character is inhabiting and the mood of the scene, but it's not like actors step on a digital set and forget that they're not actually there.
Maybe in this immersive entertainment concept, there would be versions with a vehicle (with wind and water and haptics and fun stuff like that) which moves around the set? Then maybe they could choreograph some of the parallax motion to give you more of a sense of speed and traversal than you are actually traveling. (Just the thought of that though is giving me motion sickness pangs.) It'd still be flat walls you're wheeling around, but if you're not in control of your perspective by being on foot, perhaps they could add in more fake details to make it seem more real.