Pages has actually been GA since April of this year[1] - since then, we've released support for deploy hooks, redirect/custom header files, GitLab support, and as you mentioned above, a Workers function integration.

We have a really excellent team building Pages, and we still think there's a lot of unexplored territory around Pages/Jamstack and how it interacts with serverless and edge functions. Exciting times!

[1]: https://blog.cloudflare.com/cloudflare-pages-ga/