One of the things I find annoying with Answers (an otherwise very good and useful system) is, and despite me only following Confluence, that if I run a search I get a lot of Jira-related answers, which I'm not interested in.
Will the new system allow me to filter these out (preferrably before running the search)?
While others may be interested in both Confluence and Jira I'm not, so having to wade through spurious search results isn't helpful.
I think moving to Questions is a good thing though, if nothing else it will allow me to demo the system to our users and show them the benefits of having it. 
Cheers.