Some interesting insights but also somewhat flawed as:

1. This content will always be dear delivered over the web.
2. The only standardised way if navigating that will be a browser (which are are improving rapidly)
3. That browser will consume HTML and successor HTML like markups (eg Svg, Vrml)
4. The only reliable way of delivering this is through server side rendering, javascript + api frontend are inherently brittle, non accessible, and hard to index (robots are important too)

This all means headless cms are a dead end.

However the technologies mentioned in the articles are a glimpse of the future and WordPress needs to enhanced to deliver a broader range of content and functionality. But the changes needed are back end things like the taxonomy architecture, post status api, object relationships, notification queues, and database schema and support.