New updates are available for both Revit 2015 and 2016 now. The latest for 2015 is Update Release 13 and we're up to Update Release 3 for 2016. Hopefully the Autodesk Application Manager let you know already, it did for me this time. Visit your Autodesk Account page to download them if not.
These are the three related release note files that The Revit Clinic shared the other day.
Revit 2015 Update Release 13 readme and release notes
Revit 2015 Update Release 13 for R2 readme and release notes
Revit 2016 Release 2 Update 3 readme and release notes