Yes, for going to market you will always need a business person too (the hustler, see
http://learntoduck.com/micah/hackers-hustlers).
I guess the post was more about the problem solving power such teams have vs combinations of people that are more homogeneous in disciplines. It ignores the economic aspect of what comes after 'inventing'. ;)
I could have mentioned pair programming which imho benefits hugely (though not always) from the 2nd person (the passive one) coming from a loosely related or even unrelated field.
I.e. a high level 3d graphics hacker with a low lever system programmer looking over their shoulder.