  The problem of fundamental units is discussed in the context of achievements
of both theoretical physics and modern metrology. On one hand, due to
fascinating accuracy of atomic clocks, the traditional macroscopic standards of
metrology (second, metre, kilogram) are giving way to standards based on
fundamental units of nature: velocity of light $c$ and quantum of action $h$.
On the other hand, the poor precision of gravitational constant $G$, which is
widely believed to define the ``cube of theories'' and the units of the future
``theory of everything'', does not allow to use $G$ as a fundamental
dimensional constant in metrology. The electromagnetic units in SI are actually
based on concepts of prerelativistic classical electrodynamics such as ether,
electric permitivity and magnetic permeability of vacuum. Concluding remarks
are devoted to terminological confusion which accompanies the progress in basic
physics and metrology.
