  The discovery of GeV gamma-rays from classical novae has led to a
reassessment of these garden-variety explosions, and highlighted their
importance for understanding radiative shocks, particle acceleration, and dust
formation in more exotic, distant transients. Recent collaboration between
observers and theorists has revealed that shocks in novae are energetically
important, and can even dominate their bolometric luminosity. Shocks may also
explain long-standing mysteries in novae such as dust production,
super-Eddington luminosities, and `flares' in optical light curves. Here, we
highlight the multi-wavelength facilities of the next decade that will further
test our nova shock model and fulfill the promise of novae as powerful
astrophysical laboratories.
