  Can a gas behave like a crystal? Supersolidity is an intriguing and
challenging state of matter which combines key features of superfluids and
crystals. Predicted a long time ago, its experimental realization has been
recently achieved in Bose-Einstein condensed (BEC) atomic gases inside optical
resonators, spin-orbit coupled BEC's and atomic gases interacting with long
range dipolar forces. The activity on dipolar gases has been particularly
vibrant in the last few years. This perspective article summarizes the main
experimental and theoretical achievements concerning supersolidity in the field
of dipolar gases, like the observation of the density modulations caused by the
spontaneous breaking of translational invariance, the effects of coherence and
the occurrence of novel Goldstone modes. A series of important issues for the
future experimental and theoretical research are outlined including, among
others, the possible realization of quantized vortices inside these novel
crystal structure, the role of dimensionality, the characterisation of the
crystal properties and the nature of the phase transitions.
  At the end a brief overview on some other (mainly cold atomic) platforms,
where supersolidity has been observed or where supersolidty is expected to
emerge is provided.
