That teleconference has taken place, and the outcome was to unanimously vote the TS for publication!
With this vote having passed, the final draft of the TS will be sent to the ISO head offices, which will complete the publication process within a couple of months.
With the TS published, the committee will be on the lookout for feedback from implementers and users, to see how the proposed design weathers real-world codebases and compiler architectures. This will allow the committee to determine whether any design changes need to be made before merging the contents of the TS into the C++ International Standard, thus making the feature all official (and hard to change the design of).
GCC has a substantially complete implementation of the Concepts TS in a branch; if you’re interested in concepts, I encourage you to try it out!