Correct me if I'm mistaken, but from what I've read so far, I can not run an app during development on my TV? In other words, I can only run it when I publish it.
If I'm wrong, and I hope I am, please tell me how to do it.
From what I understand, yes. We cannot run the app on TV while in WIP. Emulator only, which is pretty lame. How can you optimise for performance when you cannot test on real device?!
I personally test by hosting the app on a local web server, like node or apache, and then browse to the server IP on the TVs inbuilt browser. I have no idea if the experience is the same though, as I have not distributed an app yet.