From what I understand, that’s correct. We’re either migrating to a new host that uses PHPBB, or to a new forum code either on this host or elsewhere – although I think the team has been looking more at getting off the PHPBB engine for some reason.
(Forum networking isn’t my specialty at all, so I’m not much help on this side of the project, and I could be using terms wrongly, too. But I’m trying to describe it in a way that makes sense to me. )