Topic on Talk:Page Previews/Flow

I love this feature. Are there any plans to allow wikis to extend the functionality to articles outside the main namespace? I'm thinking particularly of the Wikipedia namespace on Wikipedia. When reading documents on Wikipedia policy, I often encounter "the core problem of users needing to open multiple tabs to gain an understanding of a word or concept within the context of the subject they are reading" - i.e. that issue that Page Previews so effectively solves in the main namespace. A preview would be especially helpful for the common case where a link uses a non-obvious shortcut, e.g. WP:WPEDIT because WP:GLC therefore WP:PSCI and WP:AWW...

Hm, I think this would be up to the community to decide. If a project decided this was something they wanted the we could discuss the application.