  It is shown that any realistic model of quintessence should be based on
Supergravity (SUGRA) since the value of the quintessence field on the attractor
is approximately the Planck mass. Under very general assumptions, the typical
shape of a SUGRA tracking potential is derived. Cosmological implications are
investigated. In particular, it is demonstrated that, generically, the equation
of state parameter is driven to a value close to -1 in agreement with recent
observations.
