If Uncharted 4: A Thief's End truly is the end of Nathan Drake's treasure-hunting career, it's a pretty spectacular way to go out. The game offers some of the best character work and storytelling the franchise has ever seen, adds some much-needed variety to climbing and exploration and, best of all, it's got apples. Big, red, delicious-looking apples that, when you eat them, you get better at shooting.
You can learn all about those exciting features, but especially those apples, in the Overview posted above.