  We present significant evidence in favour of the holographic conjecture that
``4D black holes localized on the brane found by solving the classical bulk
equations in $AdS_5$ are quantum corrected black holes and not classical
ones''. The crucial test is the calculation of the quantum correction to the
Newtonian potential based on a numerical computation of $<T^a_b>$ in
Schwarzschild spacetime for matter fields in the zero temperature Boulware
vacuum state. For the case of the conformally invariant scalar field the
leading order term is found to be $M/45\pi r^3$. This result is equivalent to
the result which was previously obtained in the weak-field approximation using
Feynman diagrams and which has been shown to be equivalent, via the AdS/CFT
duality, to the analogous calculation in Randall-Sundrum braneworlds. This
asymptotic behavior was not captured in the analytical approximations for
$<T^a_b>$ proposed in the literature. The 4D backreaction equations are then
used to make a prediction about the existence and the possible spacetime
structure of macroscopic static braneworld black holes.
