The plan is to simplify the experience offered with Google TV, which was ambitious, but didn't always work the way Google had hoped, mostly due to a lack of integration from cable providers. Word has it that Google already has major video app developers working on optimized apps for the Android TV platform, which will also be simplified from traditional offerings. The Android UI will be a simple card layout (of course, it is always cards with Google these days) that will scroll to display various apps and games. Each card will be image heavy, as you might expect, and the app UI is planned to be very consistent from app to app.
Green Throttle, the game controller company that Google quietly purchased not too long ago.The system will support voice commands and notifications, just like the current Google TV, but Google is reportedly urging developers to use notifications sparingly. The remote will feature a Menu, Home, and Back button for navigation. And, there will also be an optional game controller, likely built by
Of course, this is still a Google product, which means there will be plenty of work going on behind the scenes. Google wants to be able to recommend and suggest content, as well as allow users to automatically continue watching something that was started on a phone or tablet. One leaked document reads that Google says "Access to content should be simple and magical". This means that it should only take a few clicks or a quick search to get to whatever you want.
source: The Verge