Can't you still treat it as "dumb?" Never directly connect it to a network. Stream to it by connecting a separate streaming device (Roku, Fire-whatever, Chromecast...).
That's my plan, if "dumb" isn't an option with my next TV.
This is actually a GoogleTV by LG, which they killed off.
I'm not entirely certain, but I think it was a reference to installing apps from the app stores rather than side -loading.