Android TV puts a greater emphasis on games than any other device. Instead of being relegated to a sub-menu, games appear on the same main screen as Android TV's apps and recommendations. When you scroll down to the apps list, the games list pops into view, getting an equal amount of space, so it's impossible to ignore.
Google has even built in some hooks for people who play games on Android phones and tablets. Because everything’s coming from the Google Play Store, you’ll likely be able to buy a game once and play it across all devices. Google is also supporting achievements, friends lists and cloud saves through its Google Play Games service, so you can switch between a phone, tablet and TV without losing any progress. The only console maker that could offer something similar is Microsoft, and it has bungled every opportunity to do so.
As it's Android, developers should have very little work to do if they want to port their games to Android TV, especially if they already support game controllers (many do). There are tens of thousands of games on Google Play, and they account for 90% of the revenue from Android apps.