Both HTC and Samsung produced that in 2012, and the broader implementation of that is Miracast, built in as a "new" Nexus feature. Pretty much the same thing exists with an iPhone and an Apple TV.
Look for the possible return of this app to Chromecast when the SDK goes final.
Lack of device mirroring is a big complaint among those wanting it with Chromecast but that was not its primary intended use case.
In any case, the SDK has already adopted the ability to discern attempts to bypass DRM so even if Chromecast does somehow pick up device mirroring, don't expect it to mirror everything.
Not sure why you want me to stick to an article that I consider whining and not valid.
PS - still would prefer your definition of breakthrough.
The examples are well and good, but leaves us with a sort of "I know it when I see it" deal.
If LTE - a GSM modification - qualified as a breakthrough, DIAL certainly must.
I would consider a breakthrough somethings new or something multiple times better than available to everyone. Battery that would last a week in your phone would be a breakthrough, ISP providing 200mbps connection to anyone. All cars getting double mileage per gallon all the sudden. Now new would be something replacing smartphones entirely. This kind of device does not exist yet, so I can't give an example of it.
Now what's happening today is we get improvement of most devices, and not too noticeable in many cases. Smartphones are getting better, but how much better can they get? Bigger ppi, bigger screen, more ram. Most already have enough specs. Adding biometric reading is not something extremely anticipated. I haven't noticed anyone saying "Oh, God, I can't wait for my phone to read my fingerprints!"

