Android Police reports that instructing Assistant to "video call contact name" will now automatically boot up Duo (although if you or your contact don't have Duo, Hangouts might be initiated instead). As is the case with many Duo updates, though, things aren't working smoothly just yet. Android Police say its tests were only fruitful some of the time, and noted that the feature may still be rolling out, or may only be functional in some locations. It's not clear how long the feature has been active, but considering previous forum debate on the implausibility of the function, it's likely to be new -- so it could be buggy for a little while yet.