There's an argument commonly heard these days that open-source software is all very well for infrastructure or commodity software where the requirements are well-established, but that it can't really innovate. I laugh when I hear this, because I remember when the common wisdom was exactly the opposite -- that we hackers were great for exploratory, cutting-edge stuff but couldn't deliver reliable product.
How quickly people forget. We built the World Wide Web, fer cripessakes! The original browser and the original webservers were built by a hacker at CERN, not in some closed-door corporate shop. Before that, years before we got Linux and our own T-shirts, people who would later identify their own behavior correctly as open-source hacking built the Internet.