The update likely doesn't offer anything but the newer security patch (and the S7 is certainly not getting Android Pie, no matter how capable it might be). The January patch is one of the smallest in recent months; it fixes three critical vulnerabilities in Android and four that affect Samsung's software. Only the Galaxy S7 is getting the update at the moment, but the Galaxy S7 edge should also receive the same update in the coming days.
You can download the update by going into the Settings » Software update menu and selecting the Download updates manually option on your phone. You can also download the complete firmware from our database as an alternate method to upgrade. Do tell us if you see any new features or noticeable changes after the update has been installed.
