alt Hacker NewsIt most certainly is. It's not wifi, but it's definitely a thing. It lives down in the 900MHz world where things tend to be slower, but also travel further.
And of course: If it exists, it can be used.
That said, I haven't seen any evidence that suggests that televisions and streaming boxes are using it.
I’d kinda forgotten about it until someone mentioned open WiFi, and this seems like a use case tailor made for it. If not already, it looks like a near certainty to me.