Fire TV is the new HDTV box from Amazon. It has a lot of streaming services including music, TV shows, movies and more. Upfront music apps include Amazon's own Cloud Music Player, Pandora Radio, iHeartRadio, TuneIn, and Vevo; but if history is any guide there will be some form of a web browser included that will let you use any streaming music service that has web address (which means most of them). It's basically a set-top box for TV and lets you use it in the living room on a big screen.
Along the way you'll also get video gaming (like The Walking Dead, Monsters University, Sev Zero); voice search that lets you just tell Fire TV what to play; Netflix, Amazon Prime Instant Video, Hulu Plus and digital video rentals. It looks like Amazon Fire TV is a lot like what the Kindle Fire tablet was launched for -- an incentive for people to join Amazon Prime, which then in turn makes it easier for more people to buy things on Amazon, since its always front and center.
Other Amazon Fire TV features: dedicated GPU, 2 GB of memory, dual-band - dual-antenna Wi-Fi, 1080p video, and Dolby Digital Plus surround sound.
Get more information on Amazon Fire TV at the Amazon website.