Human evolution

Jon looked in the mirror and didn’t like what he saw.
More than something simple like looks or physical attributes, his body felt incomplete. Unfinished.
He didn’t know exactly what was missing, but he knew he had to change.
Jon grabbed the stone from the shelf, clenched it in his fist, took one last look in the mirror and said “I wish my body would evolve to what humans would look like in ____ years”