Develop apps for Android TV or not?

Has anyone here developed an app for Android TV? Is it worth the effort? How many downloads are there for Android TV apps now? Is the market promising?

There is no way to monetise it by ads so it’s only for paid apps. I don’t get much sales there - Fire TV (through Amazon AppStore) gives me more (but nothing significant).

Most of my revenue comes from sales, so the lack of ads is no problem. I think it is good to be online at the TV store early, when the competition is low. The problem is however that we don’t have an Android TV to test on. Is it possible to adapt an app for Android TV in a successful way with just an emulator to test on?

Well, I won’t target the Apple TV first but maybe at the later stages. Marketing is no issue but the target audience is limited I guess.