Boeing states that it is building its business case for the CST-100 capsule on two flights per year to the International Space Station.

XCOR Aerospace is building its business case for the Lynx spacecraft on the ability to fly four times a day.

Roll those numbers around in your mouth for a while.

Suborbital spaceflight is often dismissed as unimportant (just as the first microcomputers were dismissed as unimportant). It doesn’t have the same numbers – speed, energy, altitude, duration – as orbital spaceflight.

But like the first microcomputers, it will have the numbers that matter.