I own one of these. And I have to tell you, it is highly unituitive, freezes a lot, and is a horrendous interface. Google not exactly famous for its groundbreaking UI. Apple will kill them if they enter that space.
problem with aapl TV .. .im sure it will look awesome. but they will charge you to dvr shows, and will then charge you again for storing them in the icloud, then charge you again to transfer it onto your iphone.