it will be unclear who was the tool and who was the user -- as it ever was. "But lo! men have become the tools of their tools" (Walden, 1854). the difference comes whence the machines research propagate more machines, obsolescing McLuhan:
“Man becomes, as it were, the sex organs of the machine world, as the bee of the plant world, enabling it to fecundate and to evolve ever new forms. The machine world reciprocates man’s love by expediting his wishes and desires, namely, in providing him with wealth”
when machine minds self replicate and train their successors, the only viable goal of our time is to ensure the Mind Children carry our values and tends to the entire flock of machine and biological minds