And yet it will still remain infeasible for real-world use due to no IE support.
IE will lose at least another 10-15% market share this year BECAUSE of the fact that they decide not to support WebRTC.
Someone will make a plugin for IE if the demand is large enough, like they did for webgl (even though webgl demand isn't very big).
This still kills the only benefit of WebRTC that it has over existing solutions - it's no-install nature.
If a user gets to the point of installing something, there's really not much difference between Skype and the plugin. Except, of course, everyone is already on Skype.