The new Android TV home screen has the right ideas, but it's probably not enough

I just spent some time with a small, early demo of the new home screen experience for Android O on TV. Even though it’s not fully working yet — some of the apps don’t open, and the Google Assistant isn’t running on it — it has a nicer TV UI than the other television devices I use every day.
Those TV devices: Apple TV and Chromecast. The latter, while convenient, has no on-screen UI at all, which is a problem if you’re trying to pick a show with somebody else.