  The discovery and subsequent study of microquasars lead to major progress in
our understanding of: 1) the nature of relativistic jets seen elsewhere in the
universe, and 2) the connection between the accretion onto compact objects and
the formation of collimated jets. A detailed account of the major progress
accomplished until present was published in Annual Review of Astronomy &
Astrophysics (Mirabel & Rodr\'\i guez, 1999). Here I review the questions that
remain unanswered, as well as the future perspectives that this new field of
research is opening.
