Really it's makes me a lot to think on a challenging question "Is't able to improve web again like what improvements we seen in this decade ?" Really a lot stuff is there to be .....waiting for your perfect hand to be modified..
Awesome technology and appreciate your efforts BUT texting, like email is here to stay and its not evil. The reason is unlike voice communication, in texting there is no necessity for prompt reply, we can take our own sweet time and can always frame our answers, so as to present us in best light. So, to communicate with those, with whom not comfortable yet, we prefer texting.
If the documentation & supports of MediaSource & Source Buffer get better then WebRTC will completely lose its dominance from every conferencing software