FYI, I'm an iOS developer who uses a mix of languages, including Ob-C, every day. My coworkers and I met Swift with a mildly positive reaction - it's a decent, if imperfect, effort. It's not the second coming of Christ, but it definitely isn't a bad thing to try to modernize some of Ob-C's age-related shortcomings. The notion that we'd re-write code just to use it is utterly laughable, but we could certainly see ourselves using it to start a new app, or maybe at our next jobs.
The OP, though, sounds like a marketing intern wrote it. To add a little historical perspective: our apps are a riotous mix of C and C++ (for Android portability) and Ob-C. We chose to do it this way, within the last 3 years, so this is not a legacy issue. Both C++ and Ob-C were, at one time, meant as "replacements" for C, and we know how that turned out.
Swift may very well become the preferred language over Ob-C within, say, 5 years, for Apple-specific development. But the breathless "it'll replace C!" rhetoric is just silly. Over the coming decades, C will surely fade, but it will be replaced by other, newer, even more amazing tech, not just Swift.