Unfortunately, the forthcoming XBox One X is not a full 4k product. It's a half way house until something better comes along.
For gaming XBox One X looks great, but for media it's in the dark ages before it has been launched. There will be NO 4K passthrough on the One X, which means that hooking up a 4K satellite or cable box to try and get a one box solution, will mean downgrading the broadcast and watching in inferior quality. Thus the One X is realy a 2015/16 product.