If can surf through content by voice, too. On each screen, each app or selection is labeled with a small number. If you’re looking through a page full of comedy movies, for example, you can select one by saying “Alexa, select number 5.” Or you can move on to a new page of movies by saying “Alexa, scroll right.”

The most fun feature is the ability to control cable TV. You can ask Alexa to “tune to CNBC,” for example, and the Fire TV Cube will automatically switch inputs on your TV to your cable box and tune to CNBC. You can also tune to a specific channel number, though you can’t go to a specific program yet — so you can’t say “Alexa, tune to the Yankees game.” (At some point, however, apps like Hulu might enable that sort of voice control in over-the-top streaming apps.)

When you’re done with cable, just say “Alexa, go home,” and the box will switch inputs back to the Fire TV Cube and back to the main home screen.

Source: Tech CNBC
The Amazon Fire TV Cube is so good I want one for every TV in my house