  We start with a summary of the theory of the gravitational polarization of
the quantum vacuum, which makes it possible to consider the quantum vacuum as a
source of gravity in the Universe. Next, because virtual gravitational dipoles
are indispensable for this theory, we suggested different theoretical
possibilities for their existence. After that, we consider the first
indications that three potential phenomena which, if confirmed, will present a
major challenge to the Standard Cosmology, can be explained within the
framework of the gravitational polarization of the quantum vacuum; this adds to
the already existing successes of the theory. These potential phenomena
include: non-Newtonian gravity in internal dynamics of Wide Binary Stars; the
existence of massive relic galaxies, as NGC 1277, which is dark matter
deficient; a surprisingly fast formation of the first stars and galaxies.
Finally, as an example of the complexity of gravitational polarization, we
demonstrated the existence of regions with a negative effective gravitational
charge; the insufficient understanding of complexity of polarization was reason
for premature claims that observations within the Solar System dismiss the
gravitational polarization of the quantum vacuum. All this suggests that recent
antimatter gravity experiment at CERN (which proved that atoms and antiatoms
have gravitational charge of the same sign and hence ruled out the existence of
a particular kind of gravitational dipoles) cannot be considered as a disproof
of the theory. The existence of virtual gravitational dipoles and gravitational
polarization of the quantum vacuum remain open questions and exciting
possibilities for a new model of the Universe.
