We know that Samsung launched the Galaxy Beta Program for Android 7.0 Nougat a couple of weeks ago. A PDF file was release a few days ago with details an how to get into the beta program and what kind of changes to expect.
This guide shows all the new features and improvements in Nougat and compares them with how things used to be on previous version of android. Click here to download the Galaxy S7 and Galaxy S7 edge Android 7.0 Nougat PDF guide.