However, Microsoft has a product that needs something like WebRTC, namely Skype. It has been working on a web-based version of Skype and this has focused the collective mind on the problems of browse-to-browser communication. It now agrees that a standard is needed, just not the one Google and Mozilla are behind.
Microsoft has submitted its own proposals for CU-RTC or Customizable, Ubiquitous Real Time Communication over the Web, to the W3C.
It may well be that Microsoft's alternative has features that make is superior, but a single standard is preferable to a better non-standard. Given Microsoft's need to make Skype work in the browser, it seems likely that, should its proposal not be accepted as the standard, it will press on regardless, so splitting the development environment. Both Google and Mozilla have already put a lot of work into WebRTC and there are partial implementations in Firefox, Chrome and Opera.
This is potentially not a good development.