Well the extension is because the group hasn't been able to come to consensus on many things and appears to have outsourced some of the hard decisions to the IE

Well the extension is because the group hasn't been able to come to consensus on many things and appears to have outsourced some of the hard decisions to the IETF. IMO using SDP has brought a great deal of challenges, which the group didn't anticipate. The decision for the MTI (mandatory to implement) video codec will be made in the coming week (or months, depending on various issues): VP8 or H.264 or both or neither. I presume this decision can be updated at a later point (as and when) new codecs become mature (VP9, ..., H.265 etc.)