I have one of the newest Smart TVs and am stunned at how mind-numbingly dumb the thing is.
I have a two week old smart tv too. One of Samsung's full panel 4Ks.
I went into the smart mode to set up amazon prime streaming for the kids, and then never bother to re-hook up apple TV, v3. Reason being that Samsung's system was really quite nice I decided to use it instead (for video streaming)
Keep in mind I really had no intention of using the samsung smart tv at all beyond amazon - I guess it goes to show how thoroughly outdated apple has let their interface get...
I'm really hopeful that Apple steps it up through and impresses me. But they will have to do something really worthwhile. For ATV 1, 2, and 3, I'll admit that I bought just because it was Apple. This time they need to hold their own.