https://www.engadget.com/2017/09/21/apple-tv-4k-hands-on/
LG 4K OLED and Apple TV 4K = Viewing bilss. That’s my setup too. Nothing like it.
Quote:
“Setting up the Apple TV 4K didn't take much effort. After plugging it in, I held up my iPhone next to it, punched in a security code and the set-top box then sucked in my WiFi and iCloud account details. I reached the home screen within a few minutes, just like when I set up the last model. And thanks to the One Home Screen setting in tvOS 11, which stores your app layout in iCloud, all of the software from my last Apple TV automatically installed. I still had to manually log into iCloud and each of my streaming apps, though.”
Clssic Apple: It just works!