Something I have been thinking a lot about lately when it comes to Googles products, especially the Chromecast since they started shoving it so full of ads with their Google TV launcher.
Most of the flexibility I like about Android TV over say tvOS is that it allows me to customize things like the launcher or use SmartTube over the official YouTube app. The thing is the only time I care to do such things is to get away from the mess Google made of the product or service, usually with ads, to begin with.
So it becomes this circle of I prefer it only because it lets me undo things that it pushed upon me that its competition doesn't in the first place.
Long winded way of saying I'm not real sure what Google could do with the new model that would make it compelling to me beyond a bottom of the barrel product for a guest room or something, and even then the Onn 4k is cheaper and more or less the same experience, over just replacing it with an Apple TV when the time comes.