Some sociological theory's suggest that what we most fear is what helps explain us. http://www.jesuscreed.org/?p=2153 looks at the fears of Evangelicals and Liberals and then looks at the fear of the Emerging Church. I have pasted a snippet below because I think it sums up the fears of Organic Church perfectly.
So, what is the emerging movement House Church Movement afraid of? This might surprise you, but I think I’ve got this one nailed. What will surprise you is that it is not theology — Liberal or Evangelical. The emerging movement House Church, no matter how many times I say this it doesn’t seem to convince many, is not a movement rooted in a set of doctrines. It is theological, but not the way either Liberalism or Evangelicalism are. It’s biggest fear is centralization of power and authority... No, what the emerging movement House Church Movement fears is institutions, bureaucracy, control, and centralizing authority in a local pastor, a local presbytery, or a denomination.
Surely the biggest fear is that after all our sacrifices the new way doesn't turn out to be any more effective than the old in reaching our lost world.