  We revisit the concept of superfluidity in bosonic lattice models in low
dimensions. Then, by using numerical and analytical results obtained previously
for equivalent spinless fermion models, we show that the gapless phase of 1D
interacting bosons may be either superfluid or -remarkably- metallic and not
superfluid. The latter phase -the Bose metal- should be, according to the
mentioned results, a robust and stable phase in 1D. In higher dimensionalities
we speculate on the possibility of a stable Bose metallic phase on the verge of
a Mott transition.
