VR, XR or whatever term you want to describe it will actually "date out" the current internet browsers and platform similar to the the introduction of web-browser based internet did to the traditional books, cds, dvds and even to some extent movie theaters.

WordPress is nothing extraordinary. Actually, laravel cms is much better in comparison to wordpress. Introduction of "Gutenberg" plugin (within " because its clearly a double-speak. the plugin has nothing to do with gutenberg) can't change the fact that wordpress is a php blogging platform at its core.

The backend software such as mariadb, mysql will go through some kind of mutation and survive the VR future. But current web-browser based front-end software will be part of the "history".

Pulling data via the REST API typically returns the final markup of a post. This makes it hard for non-html based applications to parse or use the data. You can certainly sanitize the final output, but it doesn’t provide confidence going forward and often removes important context.

The keyword of the whole text beneath the Possibilities with the New WordPress Editor is data storage and retrieval.

The thing is Wordpress stores data in a third party database software such as mysql or mariadb. What's the point of logging into a website through a traditional web-browser, upload a video, text or an audio then to watch, listen or read it via a VR headset?

I believe the future of VR would be similar to a current internet only in 2 ways.
1. an OS which will run on VR set of the user
2. Number of Nodes or Virtual Reality Networks that would be connection end-points to the interested users.

You might just log in through a one-click app installed on ur VR OS and get into the VR Node. Similar to cloud gaming platforms popping up in the last few years. Even google got into this business. You don't need to download any huge games (data) to play the game which is perfect for current vr headsets as there is no need to go berserk and invest $ to r&d for petabyte ssds size of a fingernail. You won't need to install anything on user's end unless the user wants to. (no browser caches in current terms)

For example, Unity, Unreal, Lumberyard (Amazon) or even cocos-2d has much more potential in VR, XR future than wordpress or laravel or any other php-based platform.

Sorry for the long rant.