I enjoy my AppleTV 4 and recently purchased the game pad so we can play games with it. Works great.
I understand that some apps are missing like Amazon. I do not understand what is taking so long. They announce it and we have to wait months to actually get it.
Personally, I am off the grid, so I utilize an over the air antenna with a OTA Tivo box which has the Amazon App Apple is missing. It too offers Netflix, Hulu, etc, but is much slower and the picture and audio quality does not match the AppleTV.
Even though my DVD player, Tivo box, and smart TV have most of the same apps built in, I prefer to use one device as my central hub. Aside from the lack of Amazon Prime, I use my Apple TV to watch HBO, Showtime, Directv Now, Netflix, Hulu, movies using iTunes, and most importantly use Plex for my personal media. No need to switch between devices. I have it all on one device in one place. Directv Now is starting to add some local channels, so pretty soon I can ditch the Tivo altogether. As soon as Amazon is added to AppleTV I see no reason to use anything else.
My son tried every box out there. Ruku, Amazon Fire, Nvidia Shield, etc. Each had it's pluses and minuses. Even though some of the other boxes were faster or offered 4k, better audio etc., none did it all, and none had the polished UI that Apple does. He started with an AppleTV 4 and went back to AppleTV after trying all the other iterations. He did keep the Amazon Fire. It has some cool features including displaying lyrics with music. The UI is pretty slick. But for him and myself AppleTV is still king.