It’s nice to see various implementations of SIP on the Web; .I also wrote about the interworking of SIP and WebRTC sometime ago. Below is an excerpt from the concluding part in my doctoral thesis.
In summary, while session handoff has been widely explored, content sharing and the proxy services are relatively new services in the Web-browsing context. These services could encourage collaboration and community interaction between the Internet users. In addition, having shown that the integration of a SIP stack into a Web browser makes no significant change on the memory footprint or quality of experience, the inclusion of SIP in commercial Web browsers is not only feasible, but also will offer new services to end users. SIP is an extensible protocol that is not only used in multimedia services provisioning, but also in control and automation, such as smart homes. Should Free Open Source Software (FOSS) and Open Standards be widely adopted, many more innovative solutions, like this project, would be introduced into the Web browsing experience and found in this Web 2.0 era as services are rapidly converging.
SIP is good at what it does, and the future is the web .