Android TV is based on the same Android software found on mobile phones, but configured to work on TV streaming devices.
Android TV has a recommendation engine, supported by Google, that comes up with suggestions for content based on keywords such as “Marvel movies”. You can make very specific requests, and can search by typing or by using your voice.
Android TV lets you play games, much like Playstation/Amazon Fire TV do, which are searchable on the GooglePlay store. You can also watch regular TV, and don't need to buy a separate streaming box, because Android TV is packaged into Sony, Sharp and other manufacturer's TVs.
Android TV also doubles as a streamer with its Cast feature, like Chromecast. So users can find content on their mobiles or the Chrome browser and flick it over to their Android TV.