We're implementing ORTC (which actually gets its origins from outside Microsoft: http://ortc.org/history/). ORTC is essentially WebRTC "1.1" and there's active standardization work going on (in both WebRTC 1.0 and ORTC specs) to make them have a high level of compatibility. ORTC enables more scalable video and simplifies the way the data is exchanged by using a vanilla JS object style (eliminates SCP Offer/Answer).