There's a lot about the craft beer movement and homebrewing that's tied to larger social movements away from the industrialized, one-size-fits-all production that dominated the twentieth century. The craft beer industry is only driven by those trends. It's also driven by market trends. Right now there's still a lot of demand for more beers and plenty of people who can be converted to craft drinkers. As a result, there's a lot of competitors in the market but not a lot of direct competition between brewers for market space. As regional markets reach saturation through either a sufficient number of competitors and/or expansion of existing breweries we'll see if the cooperative attitude remains, how many breweries fall off and how many breweries expand into a larger role.