  This is the dawning of the age of precision cosmology, when all the important
parameters will be established to one significant figure or better, within the
cosmological model. In the age of accurate cosmology the model, which nowadays
includes general relativity theory and the CDM model for structure formation,
will be checked tightly enough to be established as a convincing approximation
to reality. I comment on how we might make the transition. We already have some
serious tests of gravity physics on the length and time scales of cosmology.
The evidence for consistency with general relativity theory is still rough, but
impressive, considering the enormous extrapolation from the empirical basis,
and these probes of gravity physics will be considerably improved by work in
progress on the cosmological tests. The CDM model has some impressive
observational successes too, and some challenges, not least of which is that
the model is based on a wonderfully optimistic view of the simplicity of
physics in the dark sector. I present as a cautionary example a model for dark
matter and dark energy that biases interpretations of cosmological observations
that assume the CDM model. In short, cosmology has become an empirically rich
subject with a well-motivated standard model, but it needs work to be
established as generally accurate.
