Yeah, it's just that simple. Game over, all you massively popular languages, because lisp has arrived!

The primary reasons to use one programming language over another are its libraries, its community (documentation, examples, etc), followed by its expressive power. In other words, just because Lisp is so badass does not mean it will dominate. That's like claiming that your new amazing EBay clone will be a big hit. In both cases, you're fighting the massive inertia of huge network effects.