https://www.techradar.com/news/amazon-fire-tv-stick-4k-packs-dolby-vision-and-hdr10-in-the-same-device

Sandwiched between the Roku Premiere and upcoming third-generation Chromecast that’s reported to be revealed at Google’s upcoming Pixel 3 event on October 9, Amazon today has unveiled a new entry in the affordable, small and powerful category: the new Amazon Fire TV Stick 4K.

Not only will Amazon's thumb drive-sized streaming device be capable of 4K HDR playback, but the updated streaming stick will have a number of new specs – like an 802.11ac Wi-Fi chip and a 1.7GHz quad-core processor – that will help it compete with (and potentially beat out) the two new small form factor streaming devices from Roku and Google.