  We examine the consequences of a universe with a non-constant cosmological
term in Einstein's equations and find that the Bianchi identities reduce to the
first law of thermodynamics when cosmological term is identified as being
proportional to the entropy density of the universe. This means that
gravitating dark energy can be viewed as entropy, but more, the holographic
principle along with the known expansion of the universe indicates that the
entropy of the universe is growing with time and this leads to a cosmic
repulsion that also grows with time. Direct implications of this result are
calculated and shown to be in good accord with recent observational data.
