Nintex 2016 for SharePoint 2016 has been released with the Forms and Workflow version. Some of the improvements include browser support for Chrome and Firefox as well as a consolidated installer for both products.
Links to the release of Nintex 2016
To the release post information.
Nintex Workflow 2016 release notes: https://community.nintex.com/docs/DOC-4163
Nintex Forms 2016 release notes: https://community.nintex.com/docs/DOC-4187