This is really interesting news and I think signals what will be a really large change in digital video in the next few years.

Moving from flash to HTML5 adaptive bitrate is not trivial task and if you are familiar with MSE/EME, it shows how powerful the browser has become in delivering rich video content, either pre-recorded or live streaming.

With this, it seems to me there is a big gap now for encoding to new adaptive codecs, like MPEG-DASH and tooling to make something like livestreaming easy to do without flash.