  Superfluidity and superconductivity have many elements in common. However, I
argue that their most important commonality has been overlooked: that both are
kinetic energy driven. Clear evidence that superfluidity in $^4He$ is kinetic
energy driven is the shape of the $\lambda$ transition and the negative thermal
expansion coefficient below $T_\lambda$. Clear evidence that superconductivity
is kinetic energy driven is the Meissner effect: I argue that otherwise the
Meissner effect would not take place. Associated with this physics I predict
that superconductors expel negative charge from the interior to the surface and
that a spin current exists in the ground state of superconductors (spin
Meissner effect). I propose that this common physics of superconductors and
superfluids originates in rotational zero point motion. This view of
superconductivity and superfluidity implies that rotational zero-point motion
is a fundamental property of the quantum world that is missed in the current
understanding.
