http://www.techradar.com/news/heres-why-the-apple-tv-still-has-a-place-in-a-world-of-smart-tvs

After two years, the Apple TV has finally been brought up to date with support for 4K HDR. But in the past two years smart TVs have also improved dramatically, leading some to suggest that there's limited place for a device like the Apple TV in our Android, Tizen, and WebOS-equipped future.

But in truth, the Apple TV 4K has a lot to offer - it's just that you'll have to be invested in Apple's device ecosystem to really enjoy it.