There could be some interesting actual OS design innovations for new permissions, access control, and sandboxing systems that are designed from the ground up for these "conjurable" experiences (or even OS components themself).

Finding some balance between access and safety for vibe-conjuring parts of the OS in a way that's still powerful but won't accidentally nuke or corrupt itself.

The historical baggage is so heavy I don't think anyone can realistically throw it away, so what we'll end up getting are almost certainly incremental improvements to existing foundations.

I do think there's some interesting space to be explored in capability-based systems, but even then I think it would mostly end up looking similar to how existing systems are, just with one more element added