"I would serve this as a challenge for the Lean Startup community. Especially the ones with the really audacious goals. Sometimes they start audacious because otherwise the product will never get to market. The Macintosh, that product had to exist in its entirety for people to wrap their heads around it,” he said, pointing to modern entrepreneurs like Elon Musk’s ventures as ones that can’t be done on a small scale at first. "You got to get the rocket into space."

http://gigaom.com/2012/12/03/marc-andreessen-not-every-start...