It is likely you are referring to unofficial community content or upcoming console-specific enhancements:
Cliffs, moblins, and Korok puzzles now load much further away. The "pop-in" of trees in the Great Plateau is drastically reduced. botw update 160 extra quality
Download the update. Ignore the memes. Enjoy the slightly smoother grass physics. Hyrule waits for no one. It is likely you are referring to unofficial
Does the update make BotW a new game? No. But it makes a great game run with just a bit more grace. And in the age of broken AAA launches, that "extra quality" is nothing to sneeze at. botw update 160 extra quality