Xbox One SmartGlass Beta app today got updated to v188.8.131.52 in Windows Phone Store. This update includes the feature to stream TV from the Xbox Digital TV Tuner to Windows Phone devices with a supported USB TV Tuner in 19 countries. It also allows you to Power On/Off the console.
Power On/Off the console from your SmartGlass app
Stream live TV from an Xbox One with a supported USB TV Tuner in 19 countries
Download it here from Windows Phone Store for free.