That's usually a feature of your provider. So far you don't see a TV as a source of content but it gets that from the internet, cable or other device so when you see content on a TV and you want it on the tablet then you get that source to play on your tablet (which is not the TV today.)
I believe that I have seen that I can get the picture from my TV down on my tablet and.
For example, if I am sitting and watching a movie on my TV so can I pull it down onmy tablet if I am going outside or something.
Is it something I can or do i just remember wrong?