Alan Stern just wrapped up things here at NSRC in Palo Alto with an observation that was at once both simple and profound. He said, and I paraphrase:
We’re moving from an era of limited access to space using very expensive vehicles (Atlas V, space shuttle) to almost unlimited access with much more affordable systems. Multple companies will be providing regular access to space using different technological approaches that will give the system true redundancy. And the only real limitation is the number of payloads people want to fly.