Play X box one title on a new xbox?

I want to get a new game on the X Box one but since the new console comes out in November, I wonder how I can play the game on the old console on the new one… The X box is backwards compatible but what do I have to do then do I just have to download it on the new console…

Of course I have the same account

All you need to do is install the game on the new Xbox.