Does it support WebRTC yet? IE always seems to be roughly ~2 years late in supporting some of the most important and future-forward HTML5 features.

Maybe they'll push WebRTC in IE12 (not guaranteed), but then it will be some key encryption standard that everyone else has decided on and they're supporting, but IE12 will be lacking. They need to keep IE more up to date with the implementation of the standards.

This seems to show the same thing (not a perfect test, but gives a rough idea about how far behind the IE team is in supporting new HTML5 standards):

http://html5test.com/results/desktop.html