https://www.cnet.com/news/black-friday-2018-amazon-deals-available-now-fire-tv-roku-fire-tablets-blink-echo-dot-sub/

When you talk (to your TV), Alexa listens.

If Fire TV isn't your thing, this Roku is a great substitute. It's got more channels, a cleaner interface and it includes a remote (shown here) that controls your TV's power and volume.