We called "Feature Lock" status as of yesterday. That means that no new features are being added to version 9.1 from this point. (There's always one or two that still go in at the last moment, though)
From this point, we are only finishing existing features, fixing bugs, and probably will continue cosmetic changes. We are very likely more than a week away from "Release Candidate", at which point we will only be fixing critical bugs before release.