If you are not using a Pixel device, the only change in this SuperSU release is improved detection of file-based encryption. This should get rid of the issue where some Nexus devices suddenly got encrypted after flashing SuperSU.
This is a minor update, containing mostly bugfixes for cameras released this past year.
This update brings fixes primarily for devices with the A/B partition layout such as the Pixels, but there are some other fixes as well.
This update makes LiveBoot compatible with Android 7's new file-based-encryption mechanism.
Here's root for the new Pixels. This post doubles as release notes for SuperSU v2.78 SR2.
No longer 0.x, and no longer BETA
Maintenance update, might fix Google Play Services crashes some have been seeing. See the XDA thread for more details.
Update to fix latest SafetyNet checks, grab it at XDA