First, the impact Alexander, who from age 13 to 17 was tutored exclusively by him.
Second, logic (and science as we know it) would have changed. His treatises, which influenced as distant thinkers as Newton, would never be written. Politics, Physics, Metaphysics, Generation of Animals , History of Animals, Nicomachean Ethics (named after his son, Nicomachus, who is thought to have edited his father's work), Rhetoric , Poetics , On the Heavens, Meteorology, and Prior Analytics .
Aristotle developed the processes of scientific observation and experimentation in the material world.
He is credited with establishing systems and categories of scholarly research that have survived to the present day.
I would question, would the scientific method have even come into play at all, or would the world have continued along with a naturalism point of view (Plato's POV)? Even if it did develop, it owuld be much longer.
Incidentally, this rather eliminates Galileo from devising a heliocentric view of the solar system, and his entire schism with the church.
For that matter, wonder what would have become of Leonardo? Likely just another Rembrandt, but still, quite interesting.
Butterflies abound around such an influential figure!