The DocBook Technical Committee has released DocBook V5.0 as a Committee Draft. That's as far as we can go by ourselves.
Over the next couple of months, we plan to jump through the various procedural hoops at OASIS to advance V5.0 through the process.
There have been no changes to the schemas since DocBook V5.0CR7.
My sincerest thanks go out to the members of the Technical Committee (past and present), and to the diverse community of DocBook users who have contributed so much to this milestone. Share and enjoy!