Rust hasn't even hit 1.0 yet.
Due to language changes many have chosen to wait until the 1.0 release. So no, it's not surprising not to see anything "of note."

Despite this they have a very active subreddit with many people coding things - especially now that they've hit beta and the language is fairly stable.

There have been a few notable interested parties (that I've seen), including indications that Google is playing around with it and another large project investigating core usage.

It will also be interesting to see how it affects the other hardware arenas.
We'll be seeing Firefox OS coming out on TVs, HDMI streaming dongles, raspberry Pi, and likely watches this year.
Upfront they focused on tuning it to run well on very low end hardware which may really pay off for them.

Wait, isn't Tizen supposed to be able to run Android apps?
If that's the case then it might not be as hard to tempt devs if all they need to do is list on Samsung's app store while they attempt to sweeten the deal in other ways (higher margins? free spa treatments?).

I feel like I need a Tolkienesque chart to keep up with this.

Hopefully by that point project Shumway will have arrived.

Why not Mozilla's Hello service?

It's browser-based, encrypted, open source and P2P.
You do currently have to use Firefox to generate the initial URL to share (but that will hopefully be remedied in the near future).

Anyone else think this is simply an attempt to let the issue calm down and be forgotten by the public?

You'd think this would have made the news.

I wish you were right, but I've spoke with one of the main developers about this and Firefox is indeed using the SDK.
Unless Google opens up things on the desktop, Firefox will likely not be getting Chromecast support anytime soon.

We will likely see an increase of client-side encoding VP9 through WebRTC.
Let others debate the extent of use, but browser-based video chat and screencasting will likely increase. This should pop many I've-never-encoded-a-video-before cherries.
The usage of VP9 will not be solely for 4k videos.

Criticize the technical merits all you like, but Mozilla's partnership with Foxconn to produce inexpensive phones may turn out to be very strategic (for both parties).

It was Q.

I feel like my response is supposed to be "Ohh! That's what it would look like if it were different!"
But the reality is that I didn't have much of an idea of what it looks like now.

I really would like to see this same setup in asm.js to see how it compares.