  In this note, as an input to the Snowmass studies, we provide a broad-brush
picture of the physics output of future colliders as a function of their center
of mass energies and luminosities. Instead of relying on precise projections of
physics reaches, which are lacking in many cases, we mainly focused on simple
benchmarks of physics yields, such as the number of Higgs boson produced. More
detailed considerations for lepton colliders are given since there have been
various recent proposals. A brief summary for hadron colliders based on a
simple scaling estimate of the physics reaches is also included.
