Yup, I mentioned the fact that *I* use the Activities overview to solve very real problems I had with the old paradigm. It simply didn't scale.
I use the best tools I can find to get my work done in the most expedient and efficient manner; tools that still respect my freedom as a user and a developer (which are the same in the FSF's eyes!) As I type this, the best option that meets my needs is Gnome3.
I don't care one bit what anyone else uses to get their work done. That's for them to decide for themselves. Nobody's forcing anyone to change or stop using their existing software/desktop environment; it's one of the core principles of the Free Software Movement -- the empowerment of its users.