The massive shift of tech that is level-3 civ will contain the power to tame the entire galaxy of star system to bring them under human dominion. o
This is entry in to the third type of civilization; Galactic Civ.
One feature of level-3 is the development of Dyson Spheres around every star system of the entire galaxy, the Mike Way. This means that travel around d the galaxy is possible, and colonization of humans can be achieved everywhere within the galaxy where human life is able to be sustained. This id the ability to populate any planet in the galaxy able to sustain "Class-M planets" of "Star Trek" fame, as 23rd century [to date, still science fiction] achievement; featuring nitrogen-oxygen atmospheres, liquid water, moderate climates, and are usually found in a star’s habitable zone, with Earth, Vulcan, and Romulus being notable [in the fictional "Star Trek" realm].
It is also thought [by Kardashev] that humanity, at this level of civilization, may be distinguishably different by evolution than today's humanity, giving us such variations as exhibited but the fictional "Star Trek" series.