Congratulations to the Opus team for their promising open audio codec and making a new Internet Engineering Task Force standard—RFC 6716!
Opus promises to provide a functional replacement for Speex and Vorbis because Opus can handle the jobs of both Speex (a voice codec) and Vorbis (a general-purpose audio codec). Of course, Opus support is already appearing in the free software world: GStreamer plugins, Firefox, and FFMpeg are already out with more on the way (VLC and Rockbox look particularly interesting to me).
Opus in Firefox should make it more likely to do voice over IP (VOIP) so you can chat with your friends in real-time using only a web browser you probably already have. In turn this means less need for VOIP apps and interesting integration with websites ahead.