If you don't want 4K, HDR or Dolby Atmos support, then let us refer you to our Fire TV Stick review or check out the Chromecast. If your life is iOS based, Apple TV will no doubt be for you.
a step-up model on last year's Amazon Fire TV Soundbar. The new model has a 3.1 channel speaker array and supports both Dolby Atmos and DTS:X, something the company's Soundbar series did not.
Though it doesn't include a subwoofer or offer advanced features like up-firing audio drivers with Dolby Atmos support, the Fire TV Soundbar does support DTS Virtual:X to simulate surround sound.
There's also a way smaller number of titles that support Atmos. However, I also gave the Fire TV Stick 4K a go on my rather elderly plasma, which is merely full HD, with Dolby 5.1 audio (heresy ...