Well, I don’t know what to say here. I want to believe this is the case but it really hasn’t happened yet, as cadjunkie explains with the Blender example above. Who knows when it will.
Even if you look at 2-D CAD there are a number of free or very cheap alternatives which are equivalent to AutoCAD, yet AutoCAD is still industry standard. Gimp and Krita are as good as Photoshop and yet Photoshop is industry standard, Inkscape vs Illustrator, etc, etc.
Fusion 360 will probably hurt Rhino for organic modellers than it will effect major CAD for a good few years yet.