9to5Google says that with basic mode, "almost everything is stripped, leaving users with just HDMI inputs and Live TV if they have an antenna plugged directly into the TV.
There's also a big banner advertising Google TV mode, which you'll presumably just have to learn to ignore.
If you're wondering what the difference is between "Android TV" and "Google TV," Google TV is kind of like the next version of Android TV.Google TV is just the Android TV codebase with a new interface, which offers things like a unified search.
By 2022, Google says TV manufacturers won't be allowed to ship Android TV and will instead ship Google TV.