I doubt this. I use an e-ink android tablet as an e-reader. I like that it's easy on the eyes. For using it to scroll Lemmy or even a web page, it's fine. But the refresh rate (even on the best settings) makes watching a video or gif on it painful.
I don't think anyone really wants an e-ink TV unless they want something that's a hybrid. The things you'd use a tv for are just not e-ink things.
It's funny that you think smart TVs don't receive updates. It's got a wifi chip for a reason.