Samsung quietly rolls out Android Nougat update for some Galaxy S7 users
The new build's number is G935FXXU1DPLR and it comes with Samsung's January security patch.
Releasing the update to select users is mostly an attempt by Samsung to test the waters and make sure everything works as expected. Despite having several beta updates and gathering a lot of feedback, when it comes to software, there's always something that could go wrong.
This information is not confirmed by Samsung, so it should be taken with a grain of salt, but with an official release knocking on the door, we're inclined to believe that the screenshot is legit.