Xbox One S question

So I got an Xbox One S recently and I noticed that it didn’t have the TV app anymore for playing other devices through it, but it still has the HDMI IN port. Anyone know how you put yout tv or other systems through this one? I tried posting in the support forums but got no reply.

If you haven’t used to app on the new console it may not be popping up on the home screen. A quick check on the Xbox support site indicates the app is still bundled with it.
Check the OneGuide hub, it should be nested in there. maybe use your mic or Kinect (if you have one) to ask Cortana?