It depends on how you define "approach". Will it happen in the indeterminate future? Sure. Will it happen in the next 10 years? I really, really doubt it. In 50 years? Possibly, but I think its too soon to guess. We may never need one, which is the idea.
I see very very large problems in groups of those who would be on the rebelling side of the revolution. Many are idealists and dreamers, that expect large scale changes that require mind-set changes in the average american to happen in short periods, and won't accept any less. The groups are highly disorganized (I for one know only ONE other Libertarian here in Kansas, for example). Many people are Libertarians, and more so Anarchists, out of Image and not Principle. Hardly anyone who is NOT a Libertarian takes being a Libertarian seriously. I've been browsing the forum for only an hour or so, but I can see the things I mentioned prevalent even here. Not abundantly so, but still...