Amazon's new Fire TV is a 4K-capable, Chromecast-style dongle
 

One of our complaints with last year's Fire TV stick is that there was no 4K support. Fortunately, Amazon now has an answer for that. Say hello to the new Fire TV, a dongle-based competitor to Google's Chromecast Ultra. It has 4K HDR video at 60 fram...

https://www.engadget.com/2017/09/27/...-tv-4K-dongle/