  In these proceedings I review recent developments concerning the hydrodynamic
description of the quark-gluon plasma (QGP). I report on the progress towards
more realistic simulations and discuss new features about the QGP transport
coefficients of the hot (and baryon dense) medium formed in heavy ion
collisions. A brief discussion is included on the applicability of
hydrodynamics and its extension to the far-from-equilibrium regime.
