Unfortunately Stallman just devolved to his "Us vs Them" mentality that fails to serve him and his movement. He should have been trying to start a debate on plug-in standards or how web application authors and hosts can build community and extensibility through open standards and free software ideals. But that didn't happen.
I would also argue that proprietary software doesn't destroy innovation, and free software doesn't create it. It's about the products in question and the industries they serve.
OH and It isn't GNU/Linux, it's just Linux.