https://www.theverge.com/circuitbreaker/2017/9/12/16277592/4k-apple-tv-announced-price-release-date-features

Apple has just unveiled a long anticipated upgrade to its Apple TV set-top box, which is now capable of playing movies and TV shows at 4K Ultra HD resolution. Tim Cook said TV is at an “inflection point” with the mainstream adoption of 4K. The new Apple TV hardware puts the company on equal footing with Roku, Amazon, and Chrome, all of which already offer devices capable of 4K streaming. The latest Apple TV will be available on September 22nd for $179 with 32GB of internal storage or $199 with 64GB. Preorders start September 15th.

In addition to 4K, Apple is embracing HDR with this latest Apple TV with support for both Dolby Vision and HDR10. These high dynamic range technologies allow for brighter highlights and an expanded range of colors on television sets that also have HDR. The difference can be striking — sometimes even more so than the jump in resolution to 4K.