You say "Xbox watch TV". Then it shows only your TV screen and you use your DVR remote like normal.
I could still be wrong, but I think your DVR remote will work the same way as if not going thru the Xbox
One from what I can see.
http://www.shacknews.com/article/79306/xbox-one-does-not-provide-any-built-in-dvr-capabilities
Not much DVR support
Seeing the OneGuide in action for live TV is pretty impressive; it lets you browse TV listings using voice and the controller much faster than a standard cable box. But when it comes to DVR control, the Xbox One is a lot less capable.
Xbox One OneGuide
OneGuide
(Credit: Microsoft)
For example, it's easy to track down a program airing later in the day using OneGuide, but once you find it, there's no way for the Xbox One to schedule a recording -- you need to pick up your cable box remote.
Similarly, OneGuide doesn't know what's currently in your DVR, so if you tell Kinect to find that episode of "Parks and Recreation" you recorded last night, you'll come up empty. You can always switch over to your standard cable box remote to deal with DVR content, but that's well short of the "single user interface" that the Xbox One is aiming to be.
IR blasting works with TVs, cable box, and AV receivers
The Xbox One controls the rest of your home theater gear using an integrated IR blaster, similar to how Logitech's Harmony Smart Control works. The Xbox representative actually name-checked Harmony a few times, and it's an apt comparison, as during the initial setup you'll need to enter the model number of your TV, amp, and cable box so they can be controlled.