Very cool, but there's still a lot that each group needs to do to be truly interoperable. You can see a rundown of the issues on webrtc.org:

http://www.webrtc.org/interop

Most of it can be worked around, but for a web developer, there's still a lot of wiring that has to get untangled for it all to work as seamlessly as it appears in the video demos.

Definitely some cool technology, though.